what are the various position designations?
ab-cd, ab, cd, ca, ai, ce, ef, eg, gh
what potential angles of recent position are there?
172, 347, 79, 225, 138, 333, 37, 238, 358
what is the recent position angle of ca?
225
what is the recent position angle of ce?
333
which has the recent smaller position angle, ca or ce?
ca