BD

#include <stdio.h>
#include <ctype.h>
#include <string.h>
void genkey(char *key,char *result){
    int i,p = 0;
    char vis[30] = {0};
    for(i = 0;key[i];i++){
        if(isupper(key[i])){
            if(!vis[key[i] - 'A']){
                vis[key[i] - 'A'] = 1;
                result[p] = tolower(key[i]);
                p++;
            }
        }
        else{
            if(!vis[key[i] - 'a']){
                vis[key[i] - 'a'] = 1;
                result[p] = key[i];
                p++;
            }
        }
    }
    for(i = 0;i < 26;i++){
        if(!vis[i]){
            result[p] = i + 'a';
            p++;
        }
    }
}
void encrypt(char *table,char ch1,char ch2){
    int i1 = 0,i2 = 0;
    while(table[i1] != ch1)i1++;
    while(table[i2] != ch2)i2++;
    int x1 = i1 % 5,x2 = i2 % 5,y1 = i1 / 5,y2 = i2 / 5;
    if(x1 == x2){
        putchar(table[((y1 + 1) % 5) * 5 + x1]);
        putchar(table[((y2 + 1) % 5) * 5 + x2]);
    }
    else if(y1 == y2){
        putchar(table[y1 * 5 + (x1 + 1) % 5]);
        putchar(table[y1 * 5 + (x2 + 1) % 5]);
    }
    else{
        putchar(table[y1 * 5 + x2]);
        putchar(table[y2 * 5 + x1]);
    }
}
int main(int argc,char **argv){
    char buffer[30] = {0};
    char table[30] = {0};
    char data[256] = {0};
    scanf("%s",buffer);
    scanf("%s",data);
    genkey(buffer,table);
    int i = 0,n = strlen(data);
    while(i < n){
        if(i == n - 1 || tolower(data[i]) == tolower(data[i + 1])){
            encrypt(table,tolower(data[i]),'x');
            i += 1;
        }
        else{
            encrypt(table,tolower(data[i]),tolower(data[i + 1]));
            i += 2;
        }
    }
    return 0;
}