def two(x):
    if x % 2 == 0:
        return True
    else:
        return False

def four(x):
    temp = x[:-2]
    if temp % 4 == 0:
        return True
    else:
        return False
def five(x):
    if x[-1] == 5 or 0:
        return True
    else:
        False
def seven(x):
    if x - (x[-1] * 2) % 7 == 0:
        return True
    else:
        return False
def nine(x):
    temp = 0
    for i in range(x):
        temp += x[i]
    if temp % 9 == 0:
        return True
    else:
        return False
def ten(x):
    if x[-1] == 0:
        return True
    else:
        return False
def eleven(x):
    temp1 = 0
    temp2 = 0
    for i in range(0, x, 2):
        temp1 += x[i]
    for i in range(1, x, 2):
        temp2 += x[i]
    if temp1 == temp2 or abs(temp1 - temp2) % 2 == 0:
        return True
    else:
        return False
def thirteen(x):
    if x[:-1] + (x[-1] * 4) % 13 == 0:
        return True
    else:
        return False
def seventeen(x):
    if x[-2:-1] -(x[-1] * 5) % 17 == 0:
        return True
    else:
        return False
def nineteen(x):
    if x[-2:-1] + (x[-1] * 2) % 19 == 0:
        return True
    else:
        return False
def twenty(x):
    if x[-1] == 0 and two(x) == True:
        return True
    else:
        return False