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


int main ( void )
{
    int i = 0 , j = 6 ;

while ( i <= j ) 
{
 printf("%d%d",j,i);
 i = i + 1 ;
 j = j - 2 ;
  }
printf("%d",i);
    
   system("pause");
   return 0 ;
    
}