#include<stdio.h>

   int main(){
        int counter=0, Sym;
        char OutSym;

        while(1){
                Sym=getchar();
                if(Sym=='\n'){
                        counter++;
                }
                if(Sym==EOF){
                        //counter++;
                        break;
                }
                else if(Sym<='Z'&&Sym>='A')Sym +=32;
                else if(Sym<='z'&&Sym>='a')Sym-=32;
                //counter++;
                OutSym=Sym;
                putchar(OutSym);
        }
        printf("\nPočet riadkov: %d\n",counter);
   return 0;
}