Given a string of digits “0-9”. The task is find the number of substrings which are divisible by 8 but not by 3.
The first line of input contains an integer T denoting the number of test cases. Then T test cases follow. The first line of each test case contains an integer N denoting the length of the numeric string.
The second line of each test case contains the numeric string.
Print the answer for each testcase in a new line.
1<= T <=100
1<= N <=10000
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