STAGING-ABRO> ;
--- Output:
STAGING-ABRO> A B;
--- Output: O
STAGING-ABRO> A B;
--- Output:
STAGING-ABRO> R;
--- Output:
STAGING-ABRO> A B;
--- Output: O
STAGING-ABRO> A B;
--- Output:
STAGING-ABRO> R;
--- Output:
STAGING-ABRO> B;
--- Output:
STAGING-ABRO> A;
--- Output: O
STAGING-ABRO> A;
--- Output:
STAGING-ABRO> B;
--- Output:
STAGING-ABRO> R B;
--- Output:
STAGING-ABRO> A;
--- Output:
STAGING-ABRO> ;
--- Output:
STAGING-ABRO> B;
--- Output: O