arr = list(map(int, input().rstrip().split()))
arra= []
if arr[0]==1 or arr[1]==0 :
print("0")
else:
for i in range(arr[0]):
b = input()
a = list(b)
arra.append(a)
count = 0
x = arr[0]-1
y = arr[1]-1
z = x*y
for i in range(x):
for j in range(y):
ar = []
ar.append(arra[i][j])
ar.append(arra[i][j + 1])
ar.append( arra[i + 1][j])
ar.append( arra[i + 1][j + 1])
if 'f' in ar and 'a' in ar and 'c' in ar and 'e' in ar:
count+=1
print(count)
1656B - Subtract Operation | 1656A - Good Pairs |
1367A - Short Substrings | 87A - Trains |
664A - Complicated GCD | 1635D - Infinite Set |
1462A - Favorite Sequence | 1445B - Elimination |
1656C - Make Equal With Mod | 567A - Lineland Mail |
1553A - Digits Sum | 1359B - New Theatre Square |
766A - Mahmoud and Longest Uncommon Subsequence | 701B - Cells Not Under Attack |
702A - Maximum Increase | 1656D - K-good |
1426A - Floor Number | 876A - Trip For Meal |
1326B - Maximums | 1635C - Differential Sorting |
961A - Tetris | 1635B - Avoid Local Maximums |
20A - BerOS file system | 1637A - Sorting Parts |
509A - Maximum in Table | 1647C - Madoka and Childish Pranks |
689B - Mike and Shortcuts | 379B - New Year Present |
1498A - GCD Sum | 1277C - As Simple as One and Two |