i n 1 : a " ]wpX " , b " ]wpY " 
 
 i n 1 : s " ݍy" , t " eMO҉" 
 
 o u t : c " vhpX " , d " vhpY " 
 
 r e c ( s , a d m s ( t ) ) 
 
 c = a + i 
 
 d = b + j 