#include<stdio.h>
#include<iostream>

int main() {
    char input[1000],reversed[1003];
    printf("Input: ");
    std::cin>>input;
    printf("\n");
    int length=0;
    while(input[length]!='\0'){
        length++;
    }
    for(int i=0;i<length;i++){
        reversed[length-i-1]=input[i];
    }
    for(int i=0;i<length;i++){
        if(reversed[i]=='a') reversed[i]='0';
        else if(reversed[i]=='e') reversed[i]='1';
        else if(reversed[i]=='i') reversed[i]='2';
        else if(reversed[i]=='o') reversed[i]='3';
        else if(reversed[i]=='u') reversed[i]='4';
    }
    reversed[length]='a';
    reversed[length+1]='c';
    reversed[length+2]='a';
    reversed[length+3]='\0';
    std::cout<<"Output: "<<reversed<<std::endl;
    return 0;
}