keypad

 #include <iostream>

#include <string>


using namespace std;


string keypadarr[]={"","./","abc","def","ghi","jkl","mno","pqrs","tuv","wxyz"};


void keypad(string s, string ans) {

    if(s.length()==0){

        cout<<ans<<endl;

        return ;

    }

    char ch=s[0];

    string code=keypadarr[ch-'0'];

    string ros=s.substr(1);

    

    for (int i=0;i<code.length();i++){

        keypad(ros,ans+code[i]);

    }

    

    

}


int main() {

    keypad("923","");


    return 0;

}

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