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:
                    
                    f = True

                    for k in range(1,len(t)):
                        
                        A = set(t[k:])
                        B = set(t[:k])

                        if A == p or B == p:
                            
                            f = False
                    
                    if f:

                        X.add(t)
        
        print(len(X))
    
    except:
        
        break