from sys import stdin
def main():
    #入力
    readline=stdin.readline
    A1,B1,A2,B2,A3,B3=map(int,readline().split())
    A=[A1,A2,A3]
    odd=0
    for i in range(3):
        if A[i]%2==1:
            odd+=1

    if odd==1 or odd==3:
        print(":-(")
    else:
        print(":-)")

if __name__=="__main__":
    main()