s1 = input()
s2 = input()
x, y, z = map(int, s1.split(':'))
a, t, k = int, int, int
if s2.count(':') == 2:
    s2 = s2.split(':')
    a = int(s2[0])
    t = int(s2[1])
    k = int(s2[2])
elif s2.count(':') == 1:
    s2 = s2.split(':')
    a = 0
    t = int(s2[0])
    k = int(s2[1])
elif s2.count(':') == 0:
    s2 = s2.split(':')
    a = 0
    t = 0
    k = int(s2[0])
xa = x + a
yt = y + t
zk = z + k
if zk >= 60:
    zk = zk % 60
    yt = yt + ((z+k) // 60)
else: zk = z + k
if yt >= 60:
    yt = yt % 60
    if (z + k) >= 60:
        xa = ((x+a) + ((y+t) + ((z+k) // 60)) // 60)
    else: xa = (x+a) + ((y+t) // 60)
else: yt = y + t
if yt < 10:
    yt = '0' + str(yt)
if zk < 10:
    zk = '0' + str(zk)
if int(xa) >= 24:
    if int(xa) % 24 < 10:
        print('0' + str(int(xa) % 24) + ':' + str(yt) + ':' + str(zk) + '+' + str((int(xa)) // 24) + ' days')
    else: print(str(int(xa) % 24) + ':' + str(yt) + ':' + str(zk) + '+' + str((int(xa)) // 24) + ' days')
else:
    if int(xa) % 24 < 10:
        print('0' + str(xa) + ':' + str(yt) + ':' + str(zk))
    else: print(str(xa) + ':' + str(yt) + ':' + str(zk))