def cltime(A, i):
    return A[i][0] * 60 + A[i][1]

def numcame(A, i):
    s = 0
    for j in range(i):
        if cltime(A, j) + 20 > cltime(A, i):
            s += 1
    return s

n = int(input())
A = []
for i in range(n):
    A.append(list(map(int, input().split())))
B = [[0, 0] for i in range(n)]
C = []
for i in range(n):
    if A[i][2] < i:
        B[i] = A[i][:2]
for i in range(n):
    if A[i][2] >= numcame(A, i):
        if i != 0 and cltime(A, i) < cltime(A, i - 1) + 20:
            S = cltime(A, i - 1) + 20
            B[i] = [S // 60, S % 60]
        else:
            S = cltime(A, i) + 20
            B[i] = [S // 60, S % 60]
            A[i] = [S // 60, S % 60, A[i][2]]
    else:
        B[i] = A[i][:2]
        A[i] = A[i - 1]
for client in B:
    print(*client)