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

int main(int argc, char *argv[]) {
    char *first, *second;

    first = malloc(22);

    if(first == NULL) {
        fprintf(stderr, "error : dynamic memory allocation.\n");
        exit(EXIT_FAILURE);
    }

    second = malloc(22);

    if(second == NULL) {
        fprintf(stderr, "error : dynamic memory allocation.\n");
        exit(EXIT_FAILURE);
    }

    strcpy(first, argv[1]);
    strcpy(second, argv[2]);

    free(first);
    free(second);

    return 0;
}