Maybe you were looking for one of these abbreviations: RCMX-RCN-RCNC-RCNN-RCNO-RCO-AK-RCO-NE-RCoA-RCOCI-RCOE.
Measure the width of your quilt and add 4-6 (or chosen excess). Design a backing to equal that width, adding 1/2 to each panel for each seam you'll use to sew it to a neighboring panel. Cut panels to the length of your quilt plus 4-6 (or chosen excess). Sew panels together with a 1/2 seam allowance. Press seams open to reduce bulk. Press backing before use.
Stretched across a cotton mat board square, the quilt block is floated -- or taped -- on top of a mat. A matching top mat is elevated by taping foam-core to the back, and an inch of the mat that the quilt block is floated on remains visible, resulting in a framed quilt block with striking depth.