Hairdresser

n = int(input())
time = [0] * n
hurry = [0] * n
answer = [0] * n
for i in range(n):
    hour, minute, hurry[i] = [int(x) for x in input().split()]
    time[i] = hour * 60 + minute
Queue = []
for i in range(n):
    while len(Queue) > 0 and Queue[0] <= time[i]:
        Queue.pop(0)
    if len(Queue) > hurry[i]:
        answer[i] = time[i]
        continue
    if len(Queue) > 0:
        ExitTime = Queue[-1] + 20
    else:
        ExitTime = time[i] + 20
    answer[i] = ExitTime
    Queue.append(ExitTime)
print('\n'.join([str(x // 60) + ' ' + str(x % 60) for x in answer]))