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

bool isBoom(char* stack, char* boom, int top, int lenB);
void printStack(char* stack, int top);

int main() {
    char str[1000001];
    char stack[1000001];
    char boom[36];
    int top = -1;

    scanf("%s",str);
    int len = strlen(str);
    scanf("%s",boom);
    int lenB = strlen(boom);

    for (int i = 0; i < len; i++) {
        stack[++top] = str[i];
        if (top + 1 >= lenB && isBoom(stack, boom, top, lenB)) {
            top -= lenB;
        }
    }

    printStack(stack, top);

    return 0;
}

bool isBoom(char* stack, char* boom, int top, int lenB) {
    for (int i=0; i<lenB; i++) {
        if (stack[top-lenB+i+1] != boom[i]) {
            return false;
        }
    }

    return true;
}

void printStack(char* stack, int top) {
    if (top == -1) printf("FRULA\n");
    else {
        for (int i=0; i<=top; i++) printf("%c", stack[i]);
        printf("\n");
    }
}