import sequtils,strutils,strscans,math
var
    t : float
    s = stdin.readline.split
    h,m : int
(h, m) = s[0..1].map(parseInt)
if scanf(s[2],"UTC+$f",t):
    discard
elif scanf(s[2],"UTC-$f",t):
    t = -1 * t
h += t.int - 9
m += round((t - t.int.float) * 60).int
if m >= 60:
    h += 1
    m -= 60
elif m < 0:
    h -= 1
    m += 60
if h < 0:
    h += 24
elif h >= 24:
    h -= 24
var
    H = $h
    M = $m
if H.len == 1:
    H = "0" & H
if M.len == 1:
    M = "0" & M
echo H, ":", M