for a in range(ord('a'), ord('z') + 1):
print(chr(a) , end="")
for a in range(ord('A'), ord('Z') + 1):
print(chr(a) , end="")
#--------------------------------
list = map(chr, range(ord('a'), ord('z') + 1))
for a in list:
print(a,end='')
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ