gt

def f(s, n = 6, t = 0):
    if s+n>=79 and t == 2:
        return True
    elif s+n>=79 and t<2:
        return False
    elif s+n<79 and t == 2:
        return False
    return f(s+1,n,t+1) or f(s*3,n,t+1) or f(s,n+1,t+1) or f(s,n*3,t+1)


def g(s, n = 6, t = 0):
    if s+n>=79 and t == 3:
        return True
    elif s+n>=79 and t<3:
        return False
    elif s+n<79 and t == 3:
        return False
    if t%2 == 0:
        return g(s + 1, n, t + 1) or g(s * 3, n, t + 1) or g(s, n + 1, t + 1) or g(s, n * 3, t + 1)
    else:
        return g(s + 1, n, t + 1) and g(s * 3, n, t + 1) and g(s, n + 1, t + 1) and g(s, n * 3, t + 1)

def h(s, n = 6, t = 0):
    if s+n>=79 and (t == 2 or t == 4):
        return True
    elif s+n>=79 and t<4:
        return False
    elif s+n<79 and t == 4:
        return False
    if t%2 == 1:
        return h(s + 1, n, t + 1) or h(s * 3, n, t + 1) or h(s, n + 1, t + 1) or h(s, n * 3, t + 1)
    else:
        return h(s + 1, n, t + 1) and h(s * 3, n, t + 1) and h(s, n + 1, t + 1) and h(s, n * 3, t + 1)

for s in range(1,100):
    if f(s):
        print('19:',s)
        break
for s in range(1,100):
    if g(s):
        print('20:',s)
for s in range(1,100):
    if h(s):
        print('21:',s)