import copy

map = []
with open("input21.txt") as file:
    for line in file:
        map.append(list(line[:-1]))
for y in range(0,26501365):
    print(str(y)+" out of 26501365")
    newmap = copy.deepcopy(map)
    for i in range(0,len(map)):
        for j in range(0,len(map[i])):
            if map[i][j] == "S":
                newmap[i][j] = "."
                if i > 0:
                    if map[i-1][j] != "#":
                        newmap[i-1][j] = "S"
                else:
                    if map[len(map)-1][j] != "#":
                        newmap[len(map)-1][j] = "S"
                if i+1 < len(map):
                    if map[i+1][j] != "#":
                        newmap[i+1][j] = "S"
                else:
                    if map[0][j] != "#":
                        newmap[0][j] = "S"
                if j > 0:
                    if map[i][j-1] != "#":
                        newmap [i][j-1] = "S"
                else:
                    if map[i][len(map[i])-1] != "#":
                        newmap[i][len(map[i])-1] = "S"
                if j+1 < len(map[i]):
                    if map[i][j+1] != "#":
                        newmap[i][j+1] = "S"
                else:
                    if map[i][0] != "#":
                        newmap[i][0] = "S"
    map = copy.deepcopy(newmap)
cnt = 0
for r in map:
    for a in r:
        cnt += 1 if a == "S" else 0
print(cnt)