import random

def scramble():
    offset = list('abcdefghijklmnopqrstuvwxyz')
    random.shuffle(offset)
    return dict(zip(list('abcdefghijklmnopqrstuvwxyz'),offset))


bestlooped = 0

for r in range(0,1):
    randkey = scramble()
    name = "az"
    temp = name
    looped = 0
    final = ""
    while name != final:
        final = ""
        for b in temp:
            final = final + randkey[b]
                    
        temp = final
        
        looped = looped + 1
    
    #print looped
    #highest iteration count
    if (looped > bestlooped):
        #print randkey
        print looped
        bestlooped = looped

print bestlooped