ascii c++

#include<bits/stdc++.h>
using namespace std;


int main()
{
    freopen("a.INP","r",stdin);
    freopen("a.OUT","w",stdout);
    string s;
    int t=0;
    cin>>s;
    for(int i=0;i<s.size();i++)
    {
        t=t*10+int(s[i])-48;
        if(97<=t&&t<=122)
        {
            cout<<char(t);
            t=0;
        }
    }
}