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

void encode_message(char*message){
    int length=strlen(message);
    for(int i=0;i<length;i++){
        char ch = message[i];
        if(isalpha(ch)){
            if(isupper(ch)){
                message[i]='A'+('Z'-ch);
            }else{
                message[i]='a'+('z'-ch);
            }
        }else if(ch !=''){
            printf("Invalid Input\n");
            exit(0);
        }
    }
    printf("%s\n",message);
}
int main(){
    char message[10000];
    fgets(message,sizeof(message),stdin);
    message[strcspn(message,"\n")]=0;
    
    if(strlen(message)<1){
        printf("Invalid Input\n");
        return 0;
    }
    encode_message(message);
    return 0;
}