#include <stdio.h>
#define MAXLINE 1000	/* maximum input line size */

int getln(char line[], int maxline);
int rtrim(char line[], int len);

/* remove trailing blanks and tabs from each line of input */
int main()
{
	int len;	/* current line length */
	char line[MAXLINE];	/* current input line */

	while ((len = getln(line, MAXLINE)) > 0)
		if ((len = rtrim(line, len)) > 0)
			printf("%s", line);
	return 0;
}

/* getln:  read a line into s, return length */
int getln(char s[], int lim)
{
	int c, i;

	for (i=0; i<lim-1 && (c=getchar())!=EOF && c!='\n'; ++i)
		s[i] = c;
	if (c == '\n') {
		s[i] = c;
		++i;
	}
	return i;
}

/* rtrim:  remove trailing blanks and tabs */
int rtrim(char s[], int len)
{
	int nl = 0;

	if (s[len-1] == '\n') {
		nl = 1;
		--len;
	}

	while (len > 0 && (s[len-1] == ' ' || s[len-1] == '\t'))
		--len;

	if (nl == 1) {
		s[len] = '\n';
		++len;
	}

	s[len] = '\0';

	return len;
}