renameFile.cpp

//        ****************  Author :  Tashin.Parvez  *************************\
//        ****************  Updated:    22-06-23     *************************\

#include <iostream>
#define faster                        \
    ios_base::sync_with_stdio(false); \
    cin.tie(0);                       \
    cout.tie(0);
#define CRACKED return 0;
#define nl endl; // NewLine

#define int long long
#define output(x) cout << x << nl // out
#define printarray(arr, len)      \
    for (int i = 0; i < len; i++) \
    {                             \
        cout << arr[i] << " ";    \
        if (i + 1 == len)         \
            cout << endl;         \
    } // array print
using namespace std;

int32_t main()
{
    faster;
    string s;
    getline(cin, s); // take line

    for (int i = 0; i < s.length(); i++)
    {
        if ((s[i] >= 'a' && s[i] <= 'z') || (s[i] >= 'A' && s[i] <= 'Z'))
            cout << s[i];
        else
            cout << '_';
    }
    cout << '_';
    cout << '_';
    
    cout << nl;

    CRACKED;
}