Features Form
1s→2s
1s→2p
1s→3s
1s→3s
1s→3p
2s→1s
2s→1p
2s→3s
2s→3p
1p→2s
1p→2p
1p→3s
1p→3p
21→3
2p→1s
2p→1p
2p→3
3→21
3→2p
3'→3s
3'→3p
3''→3's
3''→3'p
3s→1s
3s→2s
3s→1p
3s→3'
3's→3''
3p→1s
3p→2s
3p→1p
3p→3'
3'p→3''