#include <iostream>
using namespace std;
int main() {
int n, c;
cin >> n >> c;
const int ten = 10;
int nouNumar = 0;
int nrMinge = 0;
int repetari = 0;
while (n > 0) {
nrMinge = n % ten;
if (nrMinge == c) {
nouNumar += 0;
} else {
nouNumar = (nouNumar + nrMinge) * ten;
}
nrMinge = 0;
n /= ten;
repetari++;
}
int mirror = 0;
while (nouNumar > 0) {
mirror += nouNumar % ten;
mirror *= ten;
if (nouNumar < ten) {
mirror /= ten;
}
nouNumar /= ten;
}
cout << mirror;
return 0;
}
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