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


int main() {
    char tab[255];
    int liczby[11] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
    int xd[255];
    int pusty[1] = {'\0'};
    gets(tab);
    char x;
    int x1 = 0;
    int index = strlen(tab);
       for(int l = 0 ; l < index; ++l){
        if(isspace(tab[l]) > 1){
           tab[l] = '\0';
        }
       }
    for(int i = 0 ; i < index; ++i){
       /* //x1 += isspace(tab[i]);
        if(isspace(tab[i]) > 1){
            tab[i] = tab[i+1];
        }*/
     /*if(isxdigit(tab[i])==!NULL){
        ix = tab[i];
        tab[i] = liczby[ix+2];
     }*/
     if(isupper(tab[i]) == !NULL){
        tab[i]=tolower(tab[i]);
     }else{
        tab[i] = toupper(tab[i]);
     }
        x += isupper(tab[i]);
        printf("%c", tab[i]);
     }
    //printf("%i", x1);
return 0; }