#include <stdio.h>
/*
* This is a dumb little program that outputs the printable ASCII chars
* in its input.  Someday we should add code to read files.
*/
int main(ac,av)
	int   ac;
	char**av;
{	int   a, c;
	while ((c = getchar()) != EOF) {
		if ((0x20 <= c) && (c <= 0x7E)) {
			putchar(c);
		} else
		switch(c) {
		case '\n':
		case '\r':
		case '\t':
		case '\b':
			putchar(c);
		}
	}
}