-----------------------声笔双拼单字效率分析--------------------------
 2   keys: 21        items, 99131909.00     times, covering 17.48 %
 2   keys: 21        items, 99131909.00     times, covering 17.48 %
 
 3   keys: 1774      items, 371822394.00    times, covering 65.57 %
 3   keys: 1795      items, 470954303.00    times, covering 83.05 %
 
 4   keys: 2373      items, 71602121.00     times, covering 12.63 %
 4   keys: 4168      items, 542556424.00    times, covering 95.67 %
 
 5   keys: 1822      items, 19841224.00     times, covering 3.50  %
 5   keys: 5990      items, 562397648.00    times, covering 99.17 %
 
 6   keys: 860       items, 4206358.00      times, covering 0.74  %
 6   keys: 6850      items, 566604006.00    times, covering 99.91 %
 
 7   keys: 269       items, 399978.00       times, covering 0.07  %
 7   keys: 7119      items, 567003984.00    times, covering 99.98 %
 
 8   keys: 61        items, 84540.00        times, covering 0.01  %
 8   keys: 7180      items, 567088524.00    times, covering 100.00%
 
 9   keys: 13        items, 2141.00         times, covering 0.00  %
 9   keys: 7193      items, 567090665.00    times, covering 100.00%
 
 10  keys: 2         items, 272.00          times, covering 0.00  %
 10  keys: 7195      items, 567090937.00    times, covering 100.00%
 
Average Len: 3.047000000000

未能利用的声母+aeiou空位有以下21个：

be fe fi gi hi ja je jo ki pe qa qe qo ra vi vu we wi xa xe xo

未能利用的两码空位一共有以下189个：

bb bd be bp bq br bs bt bv bw cc cm cn cq ct cw cx cz dd df dn dt fc fd fe fi fk fl fm fn fp fq fr fs ft fv fw fx fy gc gi gm gn gq gt gx hc hi hm hn hq ht hx ja jb je jf jg jh jj jk jl jo jv jz kc ki km kn kq kt kx kz lf md mp mr ms mt mw np nw pd pe pp pq pr ps pt pv pw qa qb qe qf qg qh qj qk ql qo qv qz ra rc rd rl rm rn rq rt rw rx ry rz sc sm sn sq st sx td tf tn tq tt tw vc vd vg vi vm vn vp vq vs vt vu vv vw vx vy vz wb wc wd we wi wk wm wn wp wq wr ws wt wv ww wx wy xa xb xd xe xf xg xh xj xl xo xv xz yc yd yf yg yl ym yq yv yw yx yz zc zm zn zq zt zx