n = int(input())
w = n // 10000 % 10
q = n // 1000 % 10
b = n // 100 % 10
s = n // 10 % 10
g = n // 1 % 10
if w % 5 == 0 or q % 5 == 0 or b % 5 == 0 or s % 5 == 0 or g % 5 == 0:
    print(w + q + b + s + g)
else:
    print(n)
/**************************************************************
	Problem: 1659
	User: admin
	Language: Python
	Result: Accepted
	Time:136 ms
	Memory:34480 kb
****************************************************************/