必用数627
三字现:132 137 152 157 192 197 252 357
定位:36×× 3×6× 3××6 32×× 3×2× 3××2 37×× 3×7× 1×6× 5×6× 7×6× 9×6× 1×7× 5×7× 7×7× 9 ×7× 36×6× 3×62 3×66 326× 3×22 3×72 37×2 3×72 1×62