主题:利用循环结构打印出如下的图案
A A A A
ABC ABC ABC ABC
ABCDE ABCDE ABCDE ABCDE
ABCDEFG ABCDEFG ABCDEFG ABCDEFG
ABCDEFGHIABCDEFGHIABCDEFGHIABCDEFGHI
ABCDEFG ABCDEFG ABCDEFG ABCDEFG
ABCDE ABCDE ABCDE ABCDE
ABC ABC ABC ABC
A A A A
A A A A
ABC ABC ABC ABC
ABCDE ABCDE ABCDE ABCDE
ABCDEFG ABCDEFG ABCDEFG ABCDEFG
ABCDEFGHIABCDEFGHIABCDEFGHIABCDEFGHI
ABCDEFG ABCDEFG ABCDEFG ABCDEFG
ABCDE ABCDE ABCDE ABCDE
ABC ABC ABC ABC
A A A A
ABC ABC ABC ABC
ABCDE ABCDE ABCDE ABCDE
ABCDEFG ABCDEFG ABCDEFG ABCDEFG
ABCDEFGHIABCDEFGHIABCDEFGHIABCDEFGHI
ABCDEFG ABCDEFG ABCDEFG ABCDEFG
ABCDE ABCDE ABCDE ABCDE
ABC ABC ABC ABC
A A A A
A A A A
ABC ABC ABC ABC
ABCDE ABCDE ABCDE ABCDE
ABCDEFG ABCDEFG ABCDEFG ABCDEFG
ABCDEFGHIABCDEFGHIABCDEFGHIABCDEFGHI
ABCDEFG ABCDEFG ABCDEFG ABCDEFG
ABCDE ABCDE ABCDE ABCDE
ABC ABC ABC ABC
A A A A