2854: 密码翻译

#include<bits/stdc++.h>
using namespace std;
const int N=100010;
string a; //字符串 
int main() {
    getline(cin, a); //读入一行； 
    for(int i=0;i<a.size();i++)        //.size()求字符长度 
        if (a[i] >= 'a' && a[i] <= 'y') a[i] ++;
        else if (a[i] >='A'&& a[i] <='Y') a[i]++; 
        else if (a[i] == 'z') a[i] = 'a';
        else if (a[i] == 'Z') a[i] = 'A';
    cout <<a;
    return 0;
}