#include <stdio.h>
#include <ctype.h>

#define ToLower(c) ( c==0xd1 ? 0xf1 : tolower(c))
/* lower ISO Latin 1 ~N too */

main()
{
	unsigned char c;
	int lowit = 0;

	for( c=getchar(); (!feof(stdin)); c=getchar())
	{
		if (( c==' ' )||(c=='\n')||(c=='.')||(c=='\t'))
		{
			putchar(c);
			lowit=0;
		}
		else
		{
			putchar ( lowit ? ToLower(c) : c );
			lowit = 1;
		}
	}
}