R -      P ] R A -      P c d R '    P R # P ^ R A # P R ( P ] _ W  Y  Y V R A ( P R = P V ^ ] \ R A = P R * P    
   @  @ + 6 + R A * P R A '    P c d R '    P R # P ^ R A # P R ( P    W  Z ^  R A ( P R = P  Z ^ ^ R A = P R * P 
    @  @ + 6 + R A * P R A '    P c d R '    P R # P ^ R A # P R ( P  V W   \ Y 
 R A ( P R = P \  _ 
 R A = P R * P 
    @  @ + 6 + R A * P R A '    P c d 