unittest
{
	assert( [ "3 20" ].parse.expand.solve == 3 );
	assert( [ "25 100" ].parse.expand.solve == 3 );
	assert( [ "314159265 358979323846264338" ].parse.expand.solve == 31 );
}



import std.conv;
import std.range;
import std.stdio;
import std.string;
import std.typecons;

void main()
{
	stdin.byLineCopy.parse.expand.solve.writeln;
}

auto parse( Range )( Range input )
if( isInputRange!Range && is( ElementType!Range == string ) )
{
	auto xy = input.front.split.to!( long[] );
	return tuple( xy[ 0 ], xy[ 1 ] );
}

auto solve( long x, long y )
{
	auto l = 0L;
	auto n = x;
	
	while( n <= y )
	{
		l++;
		n *= 2;
	}
	
	return l;
}
