model/pattern.txt

# Unigram features
U00:%x[-2,0]
U01:%x[-1,0]
U02:%x[0,0]
U03:%x[1,0]
U04:%x[2,0]

# Bigram character combinations
U05:%x[-1,0]/%x[0,0]
U06:%x[0,0]/%x[1,0]
U07:%x[-2,0]/%x[-1,0]
U08:%x[1,0]/%x[2,0]
U09:%x[-1,0]/%x[1,0]

# Bigram (label transition)
B