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- #include<iostream>
- #include<bits/stdc++.h>
- using namespace std;
- const char A[10][5]={ "", "", "abc", "def", "ghi", "jkl", "mno", "pqrs", "tuv", "wxyz"};``
- void rec_print(int arr[],int current,int str_length,char output[]){
- if(current==str_length){
- cout<<output<<" ";
- return;
- }
- int i;
- for(i=0;i<strlen(A[arr[current]]);i++){
- output[current]=A[arr[current]][i];
- rec_print(arr,current+1,str_length,output);
- }
- }
- void printString(int ar[],int l){
- char op[l];
- rec_print(ar,0,l,op);
- }
- int main() {
- //code
- int t;
- cin>>t;
- while(t--){
- int n;
- cin>>n;
- int arr[n];
- for(int i=0;i<n;i++){
- cin>>arr[i];
- }
- printString(arr,n);
- }
- return 0;
- }
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