Probably a and b are fragments of the same quipu. Groups: irregular Colors: browns, blue Color combinations: monochrome, speckled Strings: main, pendants, secondary Ply: all S Diameter: main 5mm, pendants 1,8-2,5mm Recto/verso (tying pendant to mainstring):fragmented main Knots:1/1 endknots (like a single knot), 1/2 endknots (a single knot securing the pendant tied with only part of the pendant as active), 8, long knots (Z), single knots (Z)