-al a-a aaa aad aaf aal aan ad- ada add adf adl adn af- afa afd aff afl afn al- ala ald alf all aln an- ana and anf anl ann daa dad daf dal dan dda ddd ddf ddl ddn dfa dfd dff dfl dfn dl- dla dld dlf dll dna dnd dnf dnl dnn faa fad faf fal fan fda fdd fdf fdl fdn ffa ffd fff ffl ffn fla fld flf fll fln fna fnd fnf fnl fnn la- laa lad laf lal lan lda ldd ldf ldl ldn lfa lfd lff lfl lfn lla lld llf lll lln lna lnd lnl lnn naa nad naf nal nan nda ndd ndf ndl ndn nfa nfd nff nfl nfn nla nld nlf nll nln nna nnf nnl nnn