#!/usr/bin/env python3

import sys

input_file = sys.argv[1]

with open(input_file) as fd:
    lines = [line.rstrip() for line in fd.readlines()]

height = len(lines)
width = len(lines[0])

tmap: list[list[int]] = [[int(a) for a in line] for line in lines]

directions = [
    (0, 1),
    (0, -1),
    (1, 0),
    (-1, 0),
]


def print_path(path: list[tuple[int, int]]) -> None:
    viz = [["."] * width for _ in range(height)]
    for c, pos in enumerate(path):
        i, j = pos
        viz[i][j] = str(c)
    for line in viz:
        print("".join(line))
    print()


def score(pos: tuple[int, int], path: list[tuple[int, int]]) -> set[tuple[int, int]]:
    path = path + [pos]
    i, j = pos
    c = tmap[i][j]
    if c == 9:
        return {pos}
    reachable = set()
    for direction in directions:
        ii, jj = i + direction[0], j + direction[1]
        if ii not in range(height) or jj not in range(width):
            continue
        cc = tmap[ii][jj]
        if cc != c + 1:
            continue
        reachable |= score((ii, jj), path)
    return reachable


tscore = 0
for i in range(height):
    for j in range(width):
        c = tmap[i][j]
        if c != 0:
            continue
        cscore = len(score((i, j), []))
        # print(i, j, cscore)
        tscore += cscore

print(tscore)