给定 $a, b, c, d$，求满足 $a \leq x \leq b$，$c \leq y \leq d$ 且 $x \cdot y$ 是 $2017$ 的倍数的整数对 $(x, y)$ 的数量。
输入包含零个或多个测试用例，并以文件结束符（EOF）终止。
每个测试用例包含四个整数 $a, b, c, d$。
对于每个测试用例，输出一个整数，表示结果。
1 2017 1 2016 1 1000000000 1 1000000000
2016 991324197233775
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