2

// Online C compiler to run C program online
#include <stdio.h>
#include <stdbool.h>
#include <string.h>

int main(){
    int len = 5;
    char air[len];
    puts("Enter a name: ");
    gets(air);
    for(int i = 0; i < len; i++){
        printf("%c first occured at index %d\n",air[i],i);
      
     }
    
   
    return 0;
}