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

void change_word (char string[]);

main()
{
    char word_input[10];
    int j;

    for (j=0; j<10; j++)
	word_input[j]='\0';
    
    while (gets(word_input))	/* warning - gets() is no good (why learn?) */
    {
	change_word (word_input);
	printf("%s\n\n", word_input);
    }
}

void change_word (char string[])
{
    int i, replace=0;
    
    for (i=0; string[i]!='\0'; i++)
    {
	if (string[i]=='a')
	{
	    string[i]=replace + 49; /* add 49 to get ascii for numbers(start @1) */
	    replace++;
	}
    }
}