#Call two arms equally strong if the heaviest weights they each are able to lift are equal.

#Call two people equally strong if their strongest arms are equally strong (the strongest arm can be both the right and the left), 
#and so are their weakest arms.

#Given your and your friend's arms' lifting capabilities find out if you two are equally strong.

#Example

#For yourLeft = 10, yourRight = 15, friendsLeft = 15 and friendsRight = 10, the output should be
#areEquallyStrong(yourLeft, yourRight, friendsLeft, friendsRight) = true;
#For yourLeft = 15, yourRight = 10, friendsLeft = 15 and friendsRight = 10, the output should be
#areEquallyStrong(yourLeft, yourRight, friendsLeft, friendsRight) = true;
#For yourLeft = 15, yourRight = 10, friendsLeft = 15 and friendsRight = 9, the output should be
#areEquallyStrong(yourLeft, yourRight, friendsLeft, friendsRight) = false.

def areEquallyStrong(yourLeft, yourRight, friendsLeft, friendsRight):

    if yourLeft == friendsLeft:
        if yourRight == friendsRight:
            return True
        else:
            return False
    elif yourLeft == friendsRight:
        if yourRight == friendsLeft:
            return True
        else:
            return False
    else: 
        return False
