L4_A
More Example (combination, permutation)
L4_B
1.Flags on the masts problem
2.Permutation of “A, E, I, O, U”with blanks
3.Congress problem
Title
Syllabus
L4_A
More Example (combination, permutation)
03-5715131#35401 (請於上班時間來電,中午12-13為午休時間)
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