Untitled

#include <iostream>
using namespace std;
int main(){
	freopen("input.txt","r",stdin);
	int T,x;
	cin>>T;
	for (x = 0; x < T; x++){
		int N, i,j;
		cin>>N;
		char A[3][1000];
		for (i = 0; i < 3; i++){
			cin>>A[i];
		}
		int ans = 0;
		for (i = 0; i < N; i++){
			int dem = 0;
			if (A[0][i]== A[1][i])
				dem++;
			if (A[0][i]== A[2][i])
				dem++;
			if (A[1][i]== A[2][i])
				dem++;
			if (dem < 3) ans= ans +2 - dem;
		}
		cout<<"#"<<x+1<<" "<<ans << endl;
	}
	return 0;
}
/*
10
97
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9
different
different
different
7
zenkoku
touitsu
program
100
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1
a
a
a
4
west
east
wait
98
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99
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100
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100
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*/