#include<iostream.h>
#include<string.h>

void main()
{ char s[20], x[20]="",y[20]="";
  cin.get(s,20);
  int i=0;
  while(s[i]!=' ')
	{ x[i]=s[i];
	  i++;
	}
  x[i]='\0';
  int k=0;
  while(s[i]==' ') i++;
  while(i<strlen(s))
  { y[k]=s[i];
	k++; i++;
  }
  y[k]='\0';
  cout<<y<<" "<<x;

}