def isValid(card):
    if type(card)==int:
        card=str(card)
    #s = sum(map(int,card[::-2]))
    # "789436574365873"
    s = 0
    for i in range(len(card)-1,-1,-2):
        s += int(card[i])

    for d in card[-2::-2]:
        d = int(d)*2
        s += d%10+1 if d > 9 else d

    return s%10 == 0

def chess(bishop):
    board = [[0 for j in range(8)] for i in range(8)]
    a = 8
    #b5
    d = 8 - int(bishop[1])
    c = ord(bishop[0]) - ord('a')
    board[d][c] = 'B'
    x = c
    y = d
    while(x+1 <8 and y-1 >= 0):
        board[y-1][x+1] = '*'
        y-=1
        x+=1
    x = c
    y = d
    while(x-1 >= 0 and y+1 <8):
        board[y+1][x-1] = '*'
        y+=1
        x-=1
    for i in range (a):
        for j in range(a):
            print(board[i][j], end=' ')
        print()


chess('f6')