what about "dinghy" （小船） and "ship" （大船）

dinghy: d4, i9, n5, g7,h8, y7 > ship: s1, h8, i9  p7

 

1 = a, j, s
2 = b, k, t,
3 = c, l, u,
4 = d, m, v,
5 = e, n, w,
6 = f, o, x,
7 = g, p, y,
8 = h, q, z,
9 = i, r,