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Primary Arithmetic


:A(A,B,C), :보(낮,보,높), 벨:1(1~4)

About PrimaryArithmetic

. 런데 10 1 . 리를 리는 는 데 만들 .

Input

리 미만 . 마는 '0 0' .

output

를 더 리를 , .

Sample Input

~cpp 
123 456
555 555
123 594
0 0

Sample Output

~cpp 
No carry operation.
3 carry operations.
1 carry operation.

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