file = open('input.txt','r')

map = file.readlines()

trees = 0
right = 0
rstep = 1
dstep = 2

i = 0
while i < len(map):
    s = map[i]
    pos = (right % (len(s)-1))  
    temp = s[:pos]+'O'+s[pos+1:]
    if s[pos] == '#':
        temp = s[:pos]+'X'+s[pos+1:]
        trees += 1
    else:
        temp = s[:pos]+'O'+s[pos+1:]
    print(temp)

    right += rstep
    i += dstep
print(str(trees)+ ' trees')