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

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 (src[i] == ' ') {
            dst[i] = ' ';
            continue;
        }
        dst[i] = convert[src[i]];
    }
    return dst;
}