Poornimites 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. 

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.
t=int(raw_input())
for i in range(t):
    ans=0
    s=10
    m,n=map(int,raw_input().split())
    
    for j in range(14):
        n1=m%10
        m=m/10
        n2=n%10
        n=n/10
        if n1+n2>=s:
            ans+=1
            s=9
        else:
            s=10
    if ans==0:
    	print("No carry operation");
    elif ans==1:
    	print("1 carry operation");
    else:
    	print(str(ans)+" carry operations");