Possible configurations of protons in two- and three-body systems shown for correspondence to their quantum numbers, the angular momentum, $l$, for the two-body system and the grand-angular momentum, $K$, for the three-body system. The $K=0$ configuration is forbidden for three protons due to antisymmetrization arguments. The green color here encodes particles in $l=0$, red in $l=1$ and blue in $l=2$ states.