#include <stdio.h>
/* program detab
   replaces tab in the input with the
   proper number of blank spaces to
   the next tab stop

   assume a fixed set of tab stops,
   say, every n columns */

#define MAXLINE 1000
#define COLPERTAB 8

int ggetline(char line[], int maxline){
  int character, index;
  for(index = 0; index < maxline - 1
       && (character = getchar()) != EOF
       && character != '\n'; index++){
    line[index] = character;
  }
  line[index] = '\0';
  return index;
}

int main(){
  char line[MAXLINE];
  int index, length, column, index2;
  while ((length = ggetline(line, MAXLINE)) > 0){
    column = index = 0;
    while(index < length){
      if (line[index] != '\t'){
        putchar(line[index]);
        column++;
      }
      if (line[index] == '\t'){
        index2 = COLPERTAB - (column % COLPERTAB);
        column += index2;
        for(; index2 > 0; index2--){
          putchar(' ');
        }
      }
      index++;
    }
    putchar('\n');
  }
  return 0;
}