from itertools import chain
from timeit import timeit

var ='sans'

res = [var[:i] +' '+ var[i:] for i in range(len(var))]

def RoadRunner():
    return list(chain.from_iterable(map(str.split, res)))

def StefanPochmann():
    return [s for r in res for s in r.split()]

def pault():
    return " ".join(res).split()

def Dekel():
    return [x for y in [res[i].split() for i in range (len(res))] for x in y]

n = 10000
print("RoadRunner time:", timeit(RoadRunner, number = n))
print(RoadRunner())
print()

print("StefanPochmann time:", timeit(StefanPochmann, number = n))
print(StefanPochmann())
print()

print("pault time:", timeit(pault, number = n))
print(pault())
print()

print("Dekel time:", timeit(Dekel, number = n))
print(Dekel())
print()