Description: As we all know, Qi Lu promise (Ciba Hikaru Techno, Cirno) is a fantasy Hongo (げ そ san u-ki January u) is the premier talent, it can be said that she ⑨ synonymous. Today, however, she encountered a problem and ⑨ related. Can you help her? Such topics are given two numbers a and b (0 < = a < = b < = 10 ^ 10000), seeking a between b (including a and b) the number, how many numbers are included 9 (for example, 19,910 and so are the number 9). Enter the first acts of a number T (0 < T < = 100) indicates the number of data sets. After the T lines, each line contains two numbers a and b (0 < = a < = b < = 10 ^ 10000). Output for each set of data input and output a number that represents a to b between digital (including a and b), how many numbers are included 9. (Note: The answer can be very large)
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