Thus, within a character, each bar 16 may consist of 1, 2, 3 or 4 contiguous dark modules, and {HEAD ~ each space} 18 may consist of 1, 2, 3 or 4 contiguous white modules, so long as the total width of {TAIL ~ the character} is 7 modules 
Thus , within a character , each bar 16 may consist of 1 , 2 , 3 or 4 contiguous dark modules , and { HEAD ~ each space } 18 may consist of 1 , 2 , 3 or 4 contiguous white modules , so long as the total width of { TAIL ~ the character } is 7 modules
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH