v = input()
v = v.split(' ')
A = int(v[0])
B = int(v[1])
C = int(v[2])
D = int(v[3])

if B > C and D > A and (C + D) > (A + B) and C >= 0 and D >= 0 and A % 2 == 0:
    print("Valores aceitos")
else:
    print("Valores nao aceitos")