try:
    while True:
        n = int(input())
        data = []
        for i in range(n):
            data.append(list(input()))
        if set(data[0]) != set(data[1]):
            ground = set(data[2])
        else:
            ground = set(data[0])
        for i in range(n):
            if set(data[i]) != ground:
                x = i
                letter = ground - set(data[i])

        transposed = [[row[i] for row in data] for i in range(n)]
        data = transposed
        if set(data[0]) != set(data[1]):
            ground = set(data[2])
        else:
            ground = set(data[0])
        for i in range(n):
            if set(data[i]) != ground:
                y = i

        print(x+1, y+1, list(letter)[0])
except EOFError:
    pass