#include <iostream>
using namespace std;
int main() {
/**
* Escreva a sua solução aqui
* Code your solution here
* Escriba su solución aquí
*/
int a, b, par0, par1, soma;
cin >> a >> b;
par0 = a%2;
par1 = b%2;
do {
a = a+2;
cout << "A " << a << endl;
cout << " B " << b << endl;
} while (a < b-1);
return 0;
}
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