Buggy python submission (verdict: Time Limit Exceeded):
from statistics import mean, median,variance,stdev
import sys
import math
import fractions

def j(q):
    if q==1: print("YES")
    else:print("NO")
    exit(0)


def ct(x,y):
    if (x>y):print("")
    elif (x<y): print("")
    else: print("")

def ip():
    return int(input())

#n = ip()                              #入力整数1つ
#n,k= (int(i) for i in input().split())      #入力整数横2つ
x,y,z = (int(i) for i in input().split())    #入力整数横3つ
#n,m,x,y= (int(i) for i in input().split())  #入力整数横4つ
#a = [int(i) for i in input().split()]        #入力整数配列
#a = input()                                  #入力文字列
#a = input().split()                          #入力文字配列

#jの変数はしようできないので注意
for i in range(x,y+1):
    if i <x+z:
        print(i)
    elif i > y-z:
        print(i)

Fixed submission:
from statistics import mean, median,variance,stdev
import sys
import math
import fractions

def j(q):
    if q==1: print("AC")
    else:print("WA")
    exit(0)


def ct(x,y):
    if (x>y):print("")
    elif (x<y): print("")
    else: print("")

def ip():
    return int(input())

#n = ip()                              #入力整数1つ
#x,y= (int(i) for i in input().split())      #入力整数横2つ
a,b,k = (int(i) for i in input().split())    #入力整数横3つ
#n,m,x,y= (int(i) for i in input().split())  #入力整数横4つ
#a = [int(i) for i in input().split()]        #入力整数配列
#a = input()                                  #入力文字列
#a = input().split()                          #入力文字配列

#jの変数はしようできないので注意
#全足しにsum変数使用はsum関数使用できないので注意
c = [ i for i in range(a,min(b,a+k))]
d = [ i for i in range(max(b-k+1,a),b+1)]
e = set()
for i in range(len(c)):
    e.add(c[i])
for i in range(len(d)):
    e.add(d[i])
e = list(e)
e.sort()
for i in range(len(e)):
    print(e[i])

Buggy python submission (verdict: Time Limit Exceeded):
from statistics import mean, median,variance,stdev
import sys
import math
import fractions

def j(q):
    if q==1: print("YES")
    else:print("NO")
    exit(0)


def ct(x,y):
    if (x>y):print("")
    elif (x<y): print("")
    else: print("")

def ip():
    return int(input())

#n = ip()                              #入力整数1つ
#n,k= (int(i) for i in input().split())      #入力整数横2つ
x,y,z = (int(i) for i in input().split())    #入力整数横3つ
#n,m,x,y= (int(i) for i in input().split())  #入力整数横4つ
#a = [int(i) for i in input().split()]        #入力整数配列
#a = input()                                  #入力文字列
#a = input().split()                          #入力文字配列

#jの変数はしようできないので注意

a = [i for i in range(x,y+1)]
l = len(a)
b = a[:z]
b.extend(a[l-z:])
c = set(b)
b = list(c)
b.sort()
for i in range(len(b)):
    print(b[i])

Fixed submission:
from statistics import mean, median,variance,stdev
import sys
import math
import fractions

def j(q):
    if q==1: print("AC")
    else:print("WA")
    exit(0)


def ct(x,y):
    if (x>y):print("")
    elif (x<y): print("")
    else: print("")

def ip():
    return int(input())

#n = ip()                              #入力整数1つ
#x,y= (int(i) for i in input().split())      #入力整数横2つ
a,b,k = (int(i) for i in input().split())    #入力整数横3つ
#n,m,x,y= (int(i) for i in input().split())  #入力整数横4つ
#a = [int(i) for i in input().split()]        #入力整数配列
#a = input()                                  #入力文字列
#a = input().split()                          #入力文字配列

#jの変数はしようできないので注意
#全足しにsum変数使用はsum関数使用できないので注意
c = [ i for i in range(a,min(b,a+k))]
d = [ i for i in range(max(b-k+1,a),b+1)]
e = set()
for i in range(len(c)):
    e.add(c[i])
for i in range(len(d)):
    e.add(d[i])
e = list(e)
e.sort()
for i in range(len(e)):
    print(e[i])