Regional Students's are taught to add multi-digit numbers from right-to-left one digit at a time. Many find the "carry" operation - in which 1 is carried from one digit position to be added to the next - to be a significant challenge. Your job is to count the number of carry operations for each of addition problem so that educators may assess their difficulty.

For the input first line contains n number of records which is less then 1000. And then each line contains two numbers with spacing between them as shown in sample.

3

123 456

555 555

123 594

No carry operation

3 carry operations

1 carry operation

when the digits are added then there is no carry found as 3+6=9,2+5=7 and 1+4=5.

when the digits are added then carry is generated as 5+5 =10 so carry is found 3 times.

when the digits 9 and 2 are added only then carry is found so 1 time only

For the input first line contains n number of records which is less then 1000. And then each line contains two numbers with spacing between them as shown in sample.

**Sample Input**3

123 456

555 555

123 594

**Sample Output**No carry operation

3 carry operations

1 carry operation

**Explanation:****EXAMPLE 1:-**when the digits are added then there is no carry found as 3+6=9,2+5=7 and 1+4=5.

**EXAMPLE 2:-**when the digits are added then carry is generated as 5+5 =10 so carry is found 3 times.

**EXAMPLE 3:-**when the digits 9 and 2 are added only then carry is found so 1 time only

**Implementation:**