# a = input("请输入姓名:")
# if a.isalpha()== False:
#     print("输入不正确，请重新输入")
# else:
#     print("您输入的用户名为：%s"% a)
# age = (input("请输入年龄:"))
# if age.isdecimal() == True:
#     age = int(age)
#     if age in range(0,101) :
#         print("您输入的年龄为%s岁" % age)
#     else:
#         print("您输入的有误，请重新输入1")
# else:
#     print("您输入的有误，请重新输入")
# my_tuple = ("hello","python","itcast","hello")
# a = list(("hello","python","itcast","hello"))
# a[0]="nihaoya"
# a[1]="heaaaa"
# a[2]="wobuhao"
# a[3]="heiheihei"
# while a:
#     r1 = a.pop(0)
#     r2 = a.pop(0)
#     r3 = a.pop(0)
#     r4 = a.pop(0)
#     c = (r1,r2,r3,r4)
#     print(c)import random
balls = ["r1","r2","r3","b1","b2","b3"]
wb = ["w1","w2","w3","w4"]
boxs = []
for a in wb:
    boxs.append([a])
c = boxs.pop()
c = c.pop()
balls.append(c)
for d in balls:
    a = random.randint(0,2)
    boxs[a].append(d)
print(boxs)