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

int check(char c, char * alphabetA) {
    size_t alphsize = strlen(alphabetA);
    for (int i = 0; i < alphsize; ++i) {
        if (c == alphabetA[i])
            return 1;
    }
    return 0;
}

char * code(char * dst, char * src, char * alphabetA, char * alphabetB) {
    size_t n = strlen(src);
    size_t alphsize = strlen(alphabetA);
    char convert[256];
    for (int i = 0 ; i < alphsize; ++i) {
        convert[alphabetA[i]] = alphabetB[i];
    }
    for (int i = 0; i < n; ++i) {
        if (!check(src[i], alphabetA)) {
            dst[i] = src[i];
            continue;
        }
        dst[i] = convert[src[i]];
    }
    return dst;
}