import std.bigint,std.stdio,std.string;int M=10^^9+7,S=4629630;long y,z,e;void i(long x){y=1;for(e=M-2;e;e/=2,x=x*x%M)if(e&1)y=y*x%M;}void f(int n){if(n>M/2){f(M-1-n);z.i;z=n%2?y:M-y;}else{if(n%S>S/2){for(z=1;n%S;)z=z*++n%M;z.i;}else{for(y=1;n%S;)y=y*n--%M;}z=0;foreach(j;0..5)z=z<<6|`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`[n/S*5+j]-32;z=z*y%M;}}void main(){foreach(t;0..readln.chomp.BigInt.toInt){auto s=readln.split;BigInt C=s[0],P=s[1],r=C+1-P,l=r-P;writeln(l<0||l/M<r/M?0:(f(r%M),r=z,f(l%M),z.i,r*y%M));}}