#include <stdio.h>
int main(){
int i;
char s1[20]="TANIshka23";
for(i=0;i<20;i=i+1)
{ if (s1[i]<=90&&s1[i]>64)
{ s1[i]=s1[i]+32;}
else if(s1[i]<=122&&s1[i]>96)
{ s1[i]=s1[i]-32;}}
printf("%s",s1);}