a=list([1,21,5,3,1,23])
b=list([7,4,6,3,2,1])
x=int(input("请输入想从第几个数开始："))
y=int(input("请输入想到第几个数结束："))
c = [0, 0, 0, 0, 0, 0]
m = input("想要正着加吗？（T/F)")
for i in range(x-1,y):
    if m=="T":
        c=a[i] + b[i]
        print(c,end=" , ")
    elif m=="F":
        c=a[i] + b[y-1-i]
        print(c,end=" , ")