#include <iostream>
#include <string>
#include <sstream>

using namespace std;

int main()
{
int s;
string ss;
cout << "Enter encrypted code ";
cin >> ss;
string a[] = {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"}; 
int l = 0;
string sas = ss.substr(0,1);
string b;
while(sas != NULL) {
if(sas == " ") {
b += " ";
l += 1;
sas = ss.substr(l,1);
}
stringstream sss(sas);
sss >> s;
if(s == 0) {
l += 1;
sas = ss.substr(l,2);
stringstream sss(sas);
sss >> s;
l += 1;
}
b += a[s-1];
l += 1;
sas = ss.substr(l,1);
}
cout << endl << b;
}