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

int main(int argc, char* argv[]) {
    char* A = argv[1];
    char* B = argv[2];
    char* C = argv[3];

    size_t A_len = strlen(A);
    size_t B_len = strlen(B);
    size_t C_len = strlen(C);

    for (size_t i = 0; i < A_len; i++){
        bool reemplazo = true;
        for (size_t j = 0; j < B_len; j++) {
            if (A[i + j] != B[j]) {
                reemplazo = false;
                break;
            }
        }
        if (reemplazo) {
            printf("%s", C);
            i += B_len - 1;
        } else {
            printf("%c", A[i]);
        }
    }
    printf("\n");
    return 0;
}