#include <stdio.h>

int main(){
	unsigned n, c, cif,  novi=0, magnituda=1;

	scanf("%u %u", &n, &c);

	while(n>0){
		cif = n%10;
		if(cif==c){
			n/=10;
			continue;
		}
		novi=novi+cif*magnituda;
		magnituda*=10;
		n/=10;
	}

	printf("%u\n",novi);
	return 0;
}