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.
Square up the quilt top. Layer the quilt top and backing fabric on your work surface with right sides facing each other, then lay the batting on top, as shown in the photograph below. (If you want to quilt the top before you assemble the quilt, lay the quilt top on top of the batting, right side up.