Unit 1 b_ and p_
Unit 2 d_ and t_
Unit 3 f_ and v_
Unit 4 m_ and n_
Unit 5 h_ and j_
Unit 6 s_ and z_
Unit 7 l_ and r_
Unit 8 w_ and y_
Unit 9 k_, _x and qu_
Unit 10 hard and soft c_
Unit 11 hard and soft g_
Unit 12 short _a_
Unit 13 short _e_
Unit 14 short _i_
Unit 15 short _o_
Unit 16 short _u_
Unit 17 long _a_
Unit 18 long _i_
Unit 19 long _o_
Unit 20 long _u_
Unit 21 _ea_ and _ee(_)
Unit 22 _ai_ and _ay
Unit 23 _oa_ and _ow(_)
Unit 24 _ou_ and _ow(_)
Unit 25 _oi_ and _oy
Unit 26 long and short _oo_
Unit 27 _ue and _ui_
Unit 28 _er, _ir_ and _ur_
Unit 29 _ar_ and _or_
Unit 30 l blend - bl_, cl_, fl_
Unit 31 l blend - gl_, pl_, sl_
Unit 32 r blend - br_, cr_, fr_
Unit 33 r blend - dr_, pr_, tr_
Unit 34 s blend - sk_, sm_, sn_
Unit 35 s blend - sp_, st_, sw_
Unit 36 ending blend - _nd, _nt
Unit 37 ending blend - _ng, _nk
Unit 38 ch_ and sh_
Unit 39 ph_, th_ and wh_