from string import ascii_lowercase, ascii_uppercase


class LetterRhombus:
    def __init__(self, letter, filler=" "):
        self.letter = letter
        self.filler = filler
        self.alpha = ascii_lowercase[1:] if letter.islower() else ascii_uppercase[1:]
        self.alpha_index = self.alpha.index(letter)
        self.matrix = []
        self._build_matrix()

    def _build_matrix(self):
        self.matrix.append([self.filler for i in range(self.alpha_index + 1)] +
                           ["a" if self.letter.islower() else "A"] +
                           [self.filler for i in range(self.alpha_index + 1)])
        for index, letter in enumerate(self.alpha, start=1):
            self.matrix.append([self.filler for i in range(self.alpha_index - index + 1)] +
                               [letter] +
                               [self.filler for i in
                                range((self.alpha_index * 2 - 1) - ((self.alpha_index - index) * 2))]
                               + [letter] + [self.filler for i in range(self.alpha_index - index + 1)])
            if letter == self.letter:
                break

        self.matrix += self.matrix[-2::-1]

    def rows(self):
        return list(map(lambda x: "".join(x), self.matrix))

    def cols(self):
        to_return = []
        for j in range(len(self.matrix[0])):
            to_return.append([self.matrix[i][j] for i in range(len(self.matrix[j]))])

        return list(map(lambda x: "".join(x), to_return))


a = LetterRhombus("C")

print(*a.cols(), sep="\n")