#include <iostream>
#include <cstring>
#include <cmath>
#include <iomanip>
using namespace std;
int main () {
char letter[]={'a','b','c','d','e'};
int i, j;
for(i=0;i<5;i++;){
for(j=0;j<5;j++){
cout <<letter[i] << letter[j] << endl;
}
}
}
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