#include<stdio.h>
#include<stdlib.h>

char *O;
int *n, u, k, o, X, x, p, d;

int main()
{
   while( (o = getchar()) != EOF )
   {
      if( !x )
      {
         if( d + 2 > p &&
             !(n = (int*)realloc(n, sizeof(int) * (p = p ? p * 2 : 64))) ) {
            return -1;
         }
         n[d++] = k;
      }
      x = 0;
      if( o - 10 )
      {
         if( k >= u &&
             !(O = (char*)realloc(O, u = u ? u * 2 : 64)) ) {
            return -1;
         }
         O[k++] = o;
         x = k - n[d - 1];
         if( x > X )
            X = x;
      }
   }
   n[d] = k;
   for(o = 0; o < X; putchar(10), o++)
      for(u = d; u-- > 0;)
         putchar(o >= n[u + 1] - n[u] ? 32 : O[n[u] + o]);
   return 0;
}