#include <stdio.h>
main()
{
int j,i,sum,a[4],s,t,sum1,sum2;
scanf("%d",&sum);
s=1000;
while(sum!=6174)
{
for(i=0;i<4;i++)
{
a[i]=sum/s;
sum=sum-a[i]*s;
s=s/10;
}
for(i=0;i<3;i++)
{ for(j=0;j<3-i;j++)
if(a[j]<a[j+1])
{t=a[j];a[j]=a[j+1];a[j+1]=t;
}
}
sum1=a[0]*1000+a[1]*100+a[2]*10+a[3];
sum2=a[0]+a[1]*10+a[2]*100+a[3]*1000;
sum=sum1-sum2;
}
if(sum==6174) printf("the end and over");
}