Given a range [m..n]. You task is to find the number of integers divisible by either a or b in the given range.
The first line of input consists of an integer T denoting the number of test cases.The next line consists of four space seperated integers m, n, a, b where m and n denotes the range.
Print the number of integers divisible by a or b in the given range.
5 11 4 6
3 1000 5 9
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