---

s = open('24_23568.txt').read()
alf = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

max_len = 0
min_index = len(s)

for st in alf:
    a = s.split(st)
    current_pos = len(a[0])
    
    for i in range(1, len(a)):
        v = a[i]
        
        if all(c not in v for c in alf):
            length = len(v) + 2
            index = current_pos
            
            if length > max_len:
                max_len = length
                min_index = index
            elif length == max_len:
                if index < min_index:
                    min_index = index
                    
        current_pos += len(v) + 1

print(min_index)