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How many Fibs?
Recall the definition of the Fibonacci numbers:
f1 := 1
Given two numbers a and b, calculate how many Fibonacci numbers are in the range [a,b].
The input contains several test cases. Each test case consists of two non-negative integer numbers a and b. Input is terminated by a=b=0. Otherwise, a<=b<=10100. The numbers a and b are given with no superfluous leading zeros.
For each test case output on a single line the number of Fibonacci numbers fi with a<=fi<=b.
10 100 1234567890 9876543210 0 0
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