game_board = []
for string in range(10):
    string = input().split()
    game_board.append(string)

max, now = 0, 0
for string in game_board:
    if now > max:
        max = now
    now = 0
    for element in string:
        if element == 0:
            now += 1
        else:
            if now > max:
                max = now
            now = 0

reversed_board = game_board
for i in range(10):
    for j in range(10):
        reversed_board[i][j] = game_board[j][i]

for string in reversed_board:
    if now > max:
        max = now
    now = 0
    for element in string:
        if element == 0:
            now += 1
        else:
            if now > max:
                max = now
            now = 0