"""
Problem 4. We define words as sequences of non-space characters separated by a single space.

Write a function last_word(s) that returns the last word in s

Further, write a main() function that loads an integer n and then n strings which it prints sorted by the last word.
"""






def last_word(s):
    if s=="" or s[-1]==" ":
        return ""
    n=len(s)-1
    while n>=0:
        if s[n]==" ":
            position=n
            break
        n-=1
    else:
        return s
    return s[n+1:]

print(last_word("Panionios is the greatest team"))


def main():
    n=int(input("Enter a natural number: "))
    while n<=0:
        n=int(input("Invalid entry. Please enter a natural number: "))
    L=[]
    for i in range(n):
        L.append(input())
    return sorted(L,key=lambda t: last_word(t))
s=main()
print(s)