#include <iostream>
#include <cstdlib>
#include <cmath>

using namespace std;
void gramma(char A[], int size);
int main()
{
	char A[10];
	for (int i=0;i<10;i++) cin>>A[i];
	gramma(A,10);
	
	system ("PAUSE");
	return 0;
}
void gramma(char A[], int size)
{
	int pl=0;//to pl einai poses fores brhke idia grammata mesa ston pinaka//
	//etsi wste na meiwthei sto telos to size tou pinaka//
	for(int i=0;i<size;i++)
	{
		for(int j=i+1;j<size;j++)//edw an tha brei apo ta epomena to idio gramma me to A[i] tha ta diagrapsei//
		{
			if(A[i]==A[j])
			{
				pl=pl+1;
				for(int t=j;t<size-1;t++)//edw kanei thn diagrafh//
				{
					A[t]=A[t+1];
				}				
			}
		}
	}
	size=size-pl;
}