while 1:
    
    try:

        s = input()

        p = set(s)
        
        X = set()

        n = len(s)

        min_v = len(s)+10

        for i in range(n):
            
            for j in range(i,n):
                
                if i == 0 and j >= n-1:
                    
                    continue
                    
                t = s[i:j+1]

                if set(t) == p:
                    
                    if min_v > len(t):
                        
                        min_v = len(t)

                    X.add(t)
        
        count = 0

        for x in X:
            
            if len(x) == min_v:
                
                count += 1
        
        print(count)
    
    except:
        
        break