Crossword problem-2

sir,iam getting wrong answer on second test case. can you tell where iam getting wrong?
my code link-https://ide.codingblocks.com/s/84906

hello navin, for the tc :-

3
a ab abcd
3
aaa
abc
de

your output : a ab abcd

correct output : a ab

please try to modify your code using this tc .

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