~~~

for i in range(1,101):
x,y = map(int,input().split())
if x == 0 or y == 0 or y < 0 or x < 0:
break
if x > y:
x,y =y,x
s = 0
for j in range(x,y + 2):
if j == y + 1:
print(“Sum=%d”%s)
break
s += j
print(j,end = ‘ ‘)

~~~