Не могу понять где ошибка в коде

def isrange(i, j):
    try:
        local[i][j]
        return True
    except IndexError:
        return False
    
def long(i, j):
    if isrange(i - 1, j) and local[i - 1][j] > local[i][j]:
        local[i - 1][j] = local[i][j] + 1
        long(i - 1, j)
    if isrange(i + 1, j) and local[i + 1][j] > local[i][j]:
        local[i + 1][j] = local[i][j] + 1
        long(i + 1, j)
    if isrange(i, j - 1) and local[i][j - 1] > local[i][j]:
        local[i][j - 1] = local[i][j] + 1
        long(i, j - 1)
    if isrange(i, j + 1) and local[i][j + 1] > local[i][j]:
        local[i + 1][j] = local[i][j] + 1
        long(i, j + 1)
        
N = int(input())
M = int(input())
 
local = []
for i in range(N):
    local.append([])
    for j in range(M):
        local[i].append(10**8)
    print(local[i])
 
I = int(input())
J = int(input())
local[I][J] = 1
 
long(I, J)
 
for i in range(N):
    print(local[i])