string, ' ,',    18 ) = 15 
     <b>cposr_c</b>( string, ' ,',    14 ) = 14 
     <b>cposr_c</b>( string, ' ,',    13 ) = 10 
     <b>cposr_c</b>( string, ' ,',     9 ) =  9 
     <b>cposr_c</b>( string, ' ,',     8 ) =  4 
     <b>cposr_c</b>( string, ' ,',     3 ) =  3 
     <b>cposr_c</b>( string, ' ,',     2 ) = -1 
 

   start out of bounds: 
   -------------------- 

     <b>cposr_c</b>( string, ' ,',   230 ) = 29 
     <b>cposr_c</b>( string, ' ,',    30 ) = 29 
     <b>cposr_c</b>( string, ' ,',    