#include <bits/stdc++.h>
using namespace std;
int main() {
int A,B;
cin >> A >> B;
int i=0;
cout << "A:";
while(i<A){
cout << "]";
i++;
}
cout << endl;
i=0;
cout << "B:";
while(i<B){
cout << "]";
i++;
}
cout << endl;
}
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