Original: With these definitions the multiset written as { a , a , b } is defined as ( { a , b } , { ( a , 2 ) , ( b , 1 ) } ) , and the multiset { a , b } is defined as ( { a , b } , { ( a , 1 ) , ( b , 1 ) } ) .
Simplified: For example , in the multiset { a , a , b , b , b , c } , the multiplicities of the members a , b , and c are respectively 2 , 3 , and 1 .