t. b. t. is defined as follows.
The
B
B-function
B(t_1 t_2 dots t_k) = b_1 b_2 dots b_k
B(t
1
t
2
…t
k
)=b
1
b
2
…b
k
of a string
t_1 t_2 dots t_k
t
1
t
2
…t
k
is defined as follows.
If there is an index
j < i
j
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