def cmp1(x):
    if x < 3:
        reachable
    if x == 0:
        reachable

def cmp2(x):
    if x == 0:
        reachable
    if x < 3:
        reachable

def cmp3(x):
    if x < 3:
        reachable
    if x >= 3:
        reachable

def cmp4(x):
    if x < 3:
        reachable
    if x > 3:
        reachable

def cmp5(x):
    if x != 3:
        reachable
    elif x > 3:
        unreachable

def cmp6(x):
    if x < 3:
        reachable
    elif x < 3:
        unreachable

def cmp7(x):
    if x < 3:
        reachable
    elif x < 2:
        unreachable

def cmp8(x):
    if x < 3:
        reachable
    elif x == 3:
        reachable

def cmp9(x):
    if x < 3:
        reachable
    elif x == 2:
        unreachable


def cmp11(x):
    if x > 3:
        reachable
    if x == 0:
        reachable

def cmp12(x):
    if x == 0:
        reachable
    if x > 3:
        reachable

def cmp13(x):
    if x > 3:
        reachable
    if x <= 3:
        reachable

def cmp14(x):
    if x > 3:
        reachable
    if x < 3:
        reachable

def cmp15(x):
    if x != 3:
        reachable
    elif x < 3:
        unreachable

def cmp16(x):
    if x > 3:
        reachable
    elif x > 3:
        unreachable

def cmp17(x):
    if x > 3:
        reachable
    elif x > 4:
        unreachable

def cmp18(x):
    if x > 3:
        reachable
    elif x == 3:
        reachable

def cmp19(x):
    if x > 3:
        reachable
    elif x == 4:
        unreachable