>>751
#include <stdio.h>
int main()
{
char buf[ 81 ], *p = buf;
scanf( "%80s", buf );
while( *p )
*p++ += ( *p >= 'a' && *p <= 'z' ? 'A' - 'a' : 0 ) - ( *p >='A' && *p <= 'Z' ? 'A' - 'a' : 0 );
printf( "%s\n", buf );
return 0;
}