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.avatar_collage {
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    border-radius: 50%;
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    position: relative;
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    overflow: hidden;
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}
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.avatar_collage img {
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    position: absolute;
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    overflow: hidden;
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}
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.collage_2 .img_1 {
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    left: 0;
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    top: 0;
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    max-width: 50%;
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    max-height: 100%;
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    width: 50%;
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    height: 100%;
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}
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.collage_2 .img_2 {
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    left: 50%;
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    top: 0;
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    max-width: 50%;
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    max-height: 100%;
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    width: 50%;
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    height: 100%;
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}
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.collage_3 .img_1 {
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    left: 0;
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    top: 0;
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    max-width: 50%;
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    max-height: 50%;
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    width: 50%;
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    height: 50%;
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}
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.collage_3 .img_2 {
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    left: 50%;
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    top: 0;
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    max-width: 50%;
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    max-height: 50%;
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    width: 50%;
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    height: 50%;
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}
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.collage_3 .img_3 {
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    left: 0;
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    top: 50%;
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    max-width: 100%;
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    max-height: 50%;
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    width: 100%;
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    height: 50%;
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}
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.collage_4 .img_1 {
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    left: 0;
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    top: 0;
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    max-width: 50%;
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    max-height: 50%;
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    width: 50%;
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    height: 50%;
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}
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.collage_4 .img_2 {
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    left: 50%;
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    top: 0;
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    max-width: 50%;
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    max-height: 50%;
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    width: 50%;
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    height: 50%;
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}
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.collage_4 .img_3 {
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    left: 0;
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    top: 50%;
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    max-width: 50%;
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    max-height: 50%;
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    width: 50%;
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    height: 50%;
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}
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.collage_4 .img_4 {
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    left: 50%;
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    top: 50%;
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    max-width: 50%;
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    max-height: 50%;
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    width: 50%;
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    height: 50%;
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}