#!/usr/bin/env python3
import sys

def parse():
    G = []
    for l in sys.stdin:
        G.append([c for c in l.strip()])
    return G

def cost(G):
    def get(i, j):
        if i < 0 or j < 0 or i >= len(G) or j >= len(G[0]):
            return None
        return G[i][j]

    stk = []
    seen = set()
    tot = 0
    for i0 in range(len(G)):
        for j0 in range(len(G[0])):
            if (i0, j0) not in seen:
                stk.append((i0, j0))
            # explore the plot
            a = 0
            p = 0
            while stk:
                (i, j) = stk.pop()
                seen.add((i, j))
                crop = G[i][j]
                a += 1
                for n in [(i+1,j),(i-1,j),(i,j+1),(i,j-1)]:
                    if get(n[0],n[1]) == crop:
                        if n not in seen:
                            seen.add(n)
                            stk.append(n)
                    else:
                        p += 1
                # print((crop, i, j, a, p))
            tot += a*p
    return tot

if __name__ == '__main__':
    G = parse()
    print(cost(G))