Showing run error in test case-3

can someone please explain why its showing a run error in test case 3.

@sans_sehgal hey sanskar your program is unable to handle large no of repetition try to work with this case
aaaaaaaaaaaaaaagggxsxssyyyyyoooooooooolllllwwqwdeddddddddkjjjoooooooooooooooooooo
if you fail to implement this case do tag I will discuss a simple approach with you

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