### Problem Statement

The Incas used a sophisticated system of record keeping consisting of bundles of knotted cords. Such a bundle of cords is called a quipu. Each individual cord represents a single number. Surprisingly, the Incas used a base-10 positional system, just like we do today. Each digit of a number is represented by a cluster of adjacent knots, with spaces between neighboring clusters. The digit is determined by the number of knots in the cluster. For example, the number 243 would be represented by a cord with knots tied in the following pattern

```     -XX-XXXX-XXX-
```
where each uppercase 'X' represents a knot and each '-' represents an unknotted segment of cord (all quotes for clarity only).

Unlike many ancient civilizations, the Incas were aware of the concept of zero, and used it in their quipus. A zero is represented by a cluster containing no knots. For example, the number 204003 would be represented by a cord with knots tied in the following pattern

```     -XX--XXXX---XXX-
^^    ^^^
^^    ^^^
^^    two zeros between these three segments
^^
one zero between these two segments
```
Notice how adjacent dashes signal the presence of a zero.

Your task is to translate a single quipu cord into an integer. The cord will be given as a String knots containing only the characters 'X' and '-'. There will be a single '-' between each cluster of 'X's, as well as a leading '-' and a trailing '-'. The first cluster will not be empty.

### Definition

 Class: Quipu Method: readKnots Parameters: String Returns: int Method signature: int readKnots(String knots) (be sure your method is public)

### Constraints

-knots contains between 3 and 50 characters, inclusive.
-knots contains only the characters 'X' and '-'. Note that 'X' is uppercase.
-The first and last characters of knots are '-'s. The second character is 'X'.
-knots does not contain 10 consecutive 'X's.
-knots will represent a number between 1 and 1000000, inclusive.

### Examples

0)

 `"-XX-XXXX-XXX-"`
`Returns: 243`
 The first example above.
1)

 `"-XX--XXXX---XXX-"`
`Returns: 204003`
 The second example above.
2)

 `"-X-"`
`Returns: 1`
3)

 `"-X-------"`
`Returns: 1000000`
4)

 `"-XXXXXXXXX--XXXXXXXXX-XXXXXXXXX-XXXXXXX-XXXXXXXXX-"`
`Returns: 909979`

#### Problem url:

http://www.topcoder.com/stat?c=problem_statement&pm=1686

#### Problem stats url:

http://www.topcoder.com/tc?module=ProblemDetail&rd=4580&pm=1686

vorthys

#### Testers:

lbackstrom , brett1479

String Parsing