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题目描述：

高桥君有一台画面宽度为W，高度为H的【泰类威婶】。

请判定它画面比例W:H是4:3还是16:9。

输入格式：

$W\ H$

输出格式：

4:3 或 16:9

样例：

4 3

4:3

1920 1080

16:9

提示

$1<=H,W<=10^5$