#include <stdio.h>
#include <string.h>

int main(int argc, char const *argv[])
{
    int k=3;
    int i=0;
    char values[] = "abcdefghijklmnopqrstuvwxyz";
    char word[] = "word";
    char find = word[i];

    const char *ptr = strchr(values, find);
    if(ptr)
    {
       int index = ptr - values;
       while(i<5)
       {
          char find = word[i];
          i++;
          printf("%c", values[index+k] );
       }

    }
}