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

int brPojavljivanja(char* s, char* c, int k){
	int i, br = 0;
	for(i = 0; *(s + i); i++)
		if(*(s + i) == *c){
			br++;
			if(br == k)
				return 1;
		}
	return 0;
}


int main(int argc, char* argv[]) {
	int i, br = 0, k;
	char c, rec[101];
	FILE* in;

	if(argc != 4) {
		printf("Manjak argumenata\n");
		return 0;
	}
	in = fopen(*(argv + 1), "r");
	if(in ==NULL) {
		printf("Neuspelo otvaranje\n");
		return 0;
	}
	k = atoi(*(argv + 3));

	while(fscanf(in, "%s", rec) != EOF){
		if(brPojavljivanja(rec, *(argv + 2), k)){
			printf("Da\n");
			return 0;}
	}
	printf("Ne\n");
	return 0;
}