3.1.2

print('整数列表:')
x = list(range(97, 97+26))
for i in x:
    print(i, end='')
print('\n字符列表: ')
lower_alpha = [chr(i) for i in range(97, 97+26)]
for i in lower_alpha :
    print(i, end='')
print('\n字符数列2： ')
upper_alpha = [i.upper() for i in lower_alpha]
for i in upper_alpha:
    print(i, end='')