cho.sh

White Squares

Given an 8x8 board marked with pieces and empty cells, count how many pieces sit on the white squares of the standard alternating coloring.

Easy2ArrayImplementationSimulationInterviewNo attempts yetTime limit2sMemory limit128 MB

Problem

An 8×8 chessboard is colored with alternating black and white squares. The top-left square, (0, 0), is white. Given the current board, find how many pieces are on white squares.

Input

Eight lines are given, one for each row of the board. . means an empty square, and F means a square with a piece on it.

Output

Print the number of pieces on white squares.