inlet
{
    type patch;
    faces
    (
        ( 0  4  5  1)
        ( 1  5  6  2)
        ( 2  6  7  3)
        ( 4  8  9  5)
        ( 5  9 10  6)
        ( 6 10 11  7)
        ( 8 12 13  9)
        ( 9 13 14 10)
        (10 14 15 11)
    );
}