Please explain the logic

Question

Need the exact logic behind
https://code.sololearn.com/cMg6df1E7Y2l/?ref=app

Answer 1

d={'player1':0,"player2":0}

def sample(s):
s1=s[:]
if len(s)!=0:
return sample2(s,s1)
else:
return d

def sample2(s,s1):
if len(s)!=0:
if s.startswith(('a','e','i','o','u')):
d['player2']+=1
else:
d['player1']+=1
return sample2(s[:len(s)-1],s1)
else:
return sample(s1[1:])

s='cabbage'
print(sample(s))