Select Polygons with multiple smooth groups

need a script which can select polygons with multiple smooth groups assigned. I noticed that when I turn on:
Modify Panel →Edit Edges →"Smooth"
- on one polygon leaving few smoothing groups. Within single smoothed area polygons has few assigned smooth groups instead one sg for all this polygons :o

Will be great if this script can clean multiple smooth groups in every smoothed area (area surrounded by hard edges) and assign only single smooth group for each such areas