# age=25
#
# count=0
# while count<=5:
#     guest = int(input('输入年龄:'))
#     count+=1
#
#     if guest>age:
#         print('大了')
#     elif guest<age:
#         print('小了')
#     else:
#         print('正好')
#         break
#
for i in range(0,100,2):
    print(i)