When the operating unit is at an operating position, it is closely attached to {HEAD ~ an input unit} provided on {TAIL ~ the front surface} of a mobile phone 
When the operating unit is at an operating position , it is closely attached to { HEAD ~ an input unit } provided on { TAIL ~ the front surface } of a mobile phone
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH