Thanks a lot for your interest Hugo.

Mappings? You mean the ASCII codes for the letters? If so, then:

2: e1, e2, e3, dc, c1, c2, c3, a2
3: e4, e5, e6, dd, c4, c5, c6, b8
4: e7, e8, e9, de, df, fa, c0, c7, c8, c9, b9, ba, da
5: ea, eb, ec, ca, cb, cc
6: ed, ee, ef, fc, cd, ce, cf, bc
7: f0, f1, f2, f3, d0, d1, d3
8: f4, f5, f6, e0, fb, fd, d4, d5, d6, be, db
9: f7, f8, f9, fe, d7, d8, d9, bf

if not, then pls explain.