The Japanese soroban is type of abacus (counting tool) that is used by sliding threaded beads up and down wires. The soroban is divided into an upper deck (where each bead is worth 5 units) and a lower deck (where beads are worth 1 unit). Working from the right and moving to the left, units increase by a factor of 10. If we use "O" for a bead and "|" to show the wire, we can represent the soroban as follows:

OOOOOOO
|||||||  Upper deck
-------  Dividing line
|||||||  Lower deck
OOOOOOO
OOOOOOO
OOOOOOO
OOOOOOO

To read the number, we count the value of the number of beads that have been moved towards the dividing line. The values for the upper and lower deck are added together. In the example below, the number is 30651:

OOOO||O
||||OO|
-------
||O|O|O
OOOO|O|
OOOOOOO
OO|OOOO
OOOOOOO

0000550  Upper deck
0030101  Lower deck
  30651  Total

Given a list of strings representing the soroban, return the number being displayed.

Examples

Soroban(new string[] {
  "OOOO||O",
  "||||OO|",
  "-------",
  "|||O|OO",
  "OOOOOOO",
  "OOO|OOO",
  "OOOOO|O",
  "OOOOOO|"
}) ➞ 2584

Soroban(new string[] {
  "||OO||O",
  "OO||OO|",
  "-------",
  "OO|OO||",
  "OOO|OOO",
  "OOOO|OO",
  "|OOOOOO",
  "O|OOOOO"
}) ➞ 8901750

Notes

For more info on how to use a soroban, please check the Resources tab.