cpstoks.py

from collections import deque

s = set()
q = deque()
count = 0
pictures = ['aaabc', 'aabbc', 'aaaac']
#pictures = ['ace', 'acd']

for i in range(len(pictures)):
    for j in range(len(pictures[0])):
        if (i, j) not in s:
            q.append((i, j))
            while q:

                k, l = q.popleft()

                if (k, l) not in s:
                    if k < len(pictures)-1 and l <= len(pictures[i])-1:
                        if (k+1, l) not in s and pictures[k][l] == pictures[k+1][l] and (i+1, j) not in q:
                            q.append((k+1, l))
                    if k <= len(pictures)-1 and l < len(pictures[i])-1:
                        if (k, l+1) not in s and pictures[k][l] == pictures[k][l+1] and (k, l+1) not in q:
                            q.append((k, l+1))
                    if k > 0 and l > 0 and k <= len(pictures)-1:
                        if (k-1, l) not in s and pictures[k][l] == pictures[k-1][l] and (i-1, j) not in q:
                            q.append((k-1, l))
                    if k > 0 and l > 0 and k <= len(pictures)-1:
                        if (k, l-1) not in s and pictures[k][l] == pictures[k][l-1] and (i, j-1) not in q:
                            q.append((k, l-1))

                    s.add((k, l))

            count += 1
print(count)