#include <stdio.h>
#include <ctype.h>
#define sub int
#define my char
#define ord
#define chr(x) (x)
#define eof feof
#if 0
sub isupper {
	$_[0] =~ /^[[:upper:]]/;
}
#endif
sub main(){
	my $p,$u;
	while(!eof(stdin)){
		$p = ord(getc(stdin));
		$u = ($p > ord('A')-1 && $p < ord('Z')+1);
		if($u){
			$p+=32;
			printf(" ");
		}
		if($p<0){return 0;}
		printf("%c", $p);
	}
}
main();