#include<iostream>
#include<string>
using namespace std;
int main()
{
int x=0,l[6];
int i,ii=0,ans=0,ans1=0,j;
while(1)
{
while(cin>>x){
l[ii++]=x;
if(cin.get()=='\n') break;
}
for(i=1;i<=5;i++)
{
if(ans==0)
{ for(j=1;j<=1+ans;j++)
{ if((l[i]==l[i-j]+10) ||(l[i]==l[i-j]-10)|| (l[i]==l[i-j]-1) || (l[i]==l[i-j]+1))
ans++;}
}
else if(ans==1)
{ for(j=1;j<=1+ans;j++)
{ if((l[i]==l[i-j]+10) ||(l[i]==l[i-j]-10)|| (l[i]==l[i-j]-1) || (l[i]==l[i-j]+1))
ans++;}
}
else if(ans==2)
{ for(j=1;j<=1+ans;j++)
{ if((l[i]==l[i-j]+10) ||(l[i]==l[i-j]-10)|| (l[i]==l[i-j]-1) || (l[i]==l[i-j]+1))
ans++;}
}
else if(ans==3)
{ for(j=1;j<=1+ans;j++)
{ if((l[i]==l[i-j]+10) ||(l[i]==l[i-j]-10)|| (l[i]==l[i-j]-1) || (l[i]==l[i-j]+1))
ans++;}
}
else if(ans==4)
{ for(j=1;j<=1+ans;j++)
{ if((l[i]==l[i-j]+10) ||(l[i]==l[i-j]-10)|| (l[i]==l[i-j]-1) || (l[i]==l[i-j]+1))
ans++;}
}
}
if(ans==5)
ans1=1;
cout<<ans1<<'\n';
ans=0;
ans1=0;
ii=0;
}
return 0;}
