#include <stdio.h>
int main(){
int i;
char s1[10]="TANIshka23";
for(i=0;s1[i]>=65&&s1[i]<=90||s1[i]>=97&&s1[i]<=122;i=i+1)
{ if (s1[i]<=90)
{ s1[i]=s1[i]+32;}
else
{ s1[i]=s1[i]-32;}}
printf("%s",s1);}