1 //#define MY_DEBUG
 2 
 3 #include <iostream>
 4 #include <cstdio>
 5 using namespace std;
 6 
 7 int main()
 8 {
 9 #ifdef MY_DEBUG
10     freopen("./in.txt", "r", stdin);
11     //freopen("./out.txt", "w", stdout);
12 #endif // MY_DEBUG
13 
14     __int64 fib[55];
15     fib[1] = 1;
16     fib[2] = 1;
17     int i;
18     for (i = 3; i < 50; ++i) {
19         fib[i] = fib[i - 1] + fib[i - 2];
20     }
21 
22     int T, a, b;
23     scanf("%d", &T);
24 
25     while (T--) {
26         scanf("%d%d", &a, &b);
27         printf("%I64d\n", fib[b - a + 1]);
28     }
29 
30     return 0;
31 }