x = 2496387510
y = str(x)

def urm_nr(nr_sir):
    numar = list(nr_sir)
    n = len(numar) - 1
    while(numar[n-1] > numar[n]):
        n = n - 1
    temp = numar[n-1]
    tempn = n-1
    n = len(numar) - 1
    while(temp > numar[n]):
        n = n - 1
    numar[tempn] = numar[n]
    numar[n] = temp
    return numar

print(urm_nr(y))
print(list(y))