#include <stdio.h>
#include <stdlib.h>

int main()
{
    char line_str[200], line_other[200], ch;
    int occurrences(char *, char, int, int), a, b;
    while (gets(line_str) != NULL)
    {
        gets(line_other);
        sscanf(line_other, "%c %d %d", &ch, &a, &b);
        puts(occurrences(line_str, ch, a, b) ? "YES" : "NO");
    }
    return EXIT_SUCCESS;
}