#include <iostream>
#include <cstdlib>
using namespace std;
int main(){
string szyfr;
cin >> szyfr;
for( int i = 0; i < szyfr.length(); i+=2) {
string odszyfr;
odszyfr += szyfr[i];
odszyfr += szyfr[i+1];
int p = atoi(odszyfr.c_str());
cout << char(p);
}
}
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