孩子们我回来了

#include<bits/stdc++.h>
using namespace std;
int main(){
char a[55];
cin>>a;
for(int i=0;i<strlen(a);i++){
if(a[i]'x' or a[i]'y' or a[i]'z' or a[i]'X' or a[i]'Y' or a[i]'Z'){
int x=a[i];
char s=x+3-26;
a[i]=s;
}else{
int x=a[i];
char s=x+3;
a[i]=s;
}
}
for(int i=0;i<strlen(a);i++){
if(a[i]<='z' and a[i]>='a'){
a[i]-=32;
}else if(a[i]<='Z' and a[i]>='A'){
a[i]+=32;
}
}
for(int i=strlen(a)-1;i>=0;i--){
cout<<a[i];
}
return 0;
}