'''
3.标题：猜字母
'''
def s(ls):
    if len(ls)==1:
        return ls
    else:
        for i in range(len(ls)):
            if i%2==0:
                ls[i]="z"
        strs=str(ls)
        strs.replace("z","")
        ls=list(strs)
        s(ls)
strs=["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s"]*106
print(s(strs))


bec6ba45a61cc2bc36b3c32fa095b175b8e92955
<mask token>

<mask token>


def s(ls):
    if len(ls) == 1:
        return ls
    else:
        for i in range(len(ls)):
            if i % 2 == 0:
                ls[i] = 'z'
        strs = str(ls)
        strs.replace('z', '')
        ls = list(strs)
        s(ls)


<mask token>

<mask token>


def s(ls):
    if len(ls) == 1:
        return ls
    else:
        for i in range(len(ls)):
            if i % 2 == 0:
                ls[i] = 'z'
        strs = str(ls)
        strs.replace('z', '')
        ls = list(strs)
        s(ls)


<mask token>
print(s(strs))

<mask token>


def s(ls):
    if len(ls) == 1:
        return ls
    else:
        for i in range(len(ls)):
            if i % 2 == 0:
                ls[i] = 'z'
        strs = str(ls)
        strs.replace('z', '')
        ls = list(strs)
        s(ls)


strs = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
    'n', 'o', 'p', 'q', 'r', 's'] * 106
print(s(strs))

'''
3.标题：猜字母
'''
def s(ls):
    if len(ls)==1:
        return ls
    else:
        for i in range(len(ls)):
            if i%2==0:
                ls[i]="z"
        strs=str(ls)
        strs.replace("z","")
        ls=list(strs)
        s(ls)
strs=["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s"]*106
print(s(strs))

