import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A collection that supports order-independent equality, like {@link Set}, but may have duplicate
 * elements. A multiset is also sometimes called a <i>bag</i>.
 *
 * <p>Elements of a multiset that are equal to one another are referred to as <i>occurrences</i> of
 * the same single element. The total number of occurrences of an element in a multiset is called

import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A collection that supports order-independent equality, like {@link Set}, but may have duplicate
 * elements. A multiset is also sometimes called a <i>bag</i>.
 *
 * <p>Elements of a multiset that are equal to one another are referred to as <i>occurrences</i> of
 * the same single element. The total number of occurrences of an element in a multiset is called

  Here one of the guinea-pigs cheered, and was immediately
suppressed by the officers of the court.  (As that is rather a
hard word, I will just explain to you how it was done.  They had
a large canvas bag, which tied up at the mouth with strings:
into this they slipped the guinea-pig, head first, and then sat
upon it.)

  `I'm glad I've seen that done,' thought Alice.  `I've so often

2231..22F1    ; valid                  ;      ; NV8    # 1.1  CLOCKWISE INTEGRAL..DOWN RIGHT DIAGONAL ELLIPSIS
22F2..22FF    ; valid                  ;      ; NV8    # 3.2  ELEMENT OF WITH LONG HORIZONTAL STROKE..Z NOTATION BAG MEMBERSHIP
2300          ; valid                  ;      ; NV8    # 1.1  DIAMETER SIGN
2301          ; valid                  ;      ; NV8    # 3.0  ELECTRIC ARROW