def demo():
while True:
a,n=eval(input())
if 1<=a<=9 and 1<=n<=9:
____(1)_______
s=[str(a)*i for i in range(1,n+1)]
s1=[____(2)______ for v in s]
print(_____(3)_______)
demo()
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def demo():
while True:
a,n=eval(input())
if 1<=a<=9 and 1<=n<=9:
____(1)_______
s=[str(a)*i for i in range(1,n+1)]
s1=[____(2)______ for v in s]
print(_____(3)_______)
demo()10,3 3,12 4,10 5,6
617280
样例说明：
前三组数因为不符合要求，都被忽略了，617280对应的是最后一组输入“5,6”的计算结果