字母图形

思路：

• 利用数字转字符，chr(num)
• 上述变换，抽象为数学形式就是 abs(i-j) + ascall_A，然后再转换成对应的ascall码

# ABCDEFG
# BABCDEF
# CBABCDE
# DCBABCD
# EDCBABC
# A -> 65
n, m = input().split()
n, m = int(n), int(m) # n行，m列
ascall_A = 65
# print(row)
for i in range(n):
    for j in range(m):
        char_num = abs(i-j) + ascall_A
        print(chr(char_num), end='')
    print('')