u/ferro31_

import os, random

def greet():
    with open(os.getcwd() + "/solution.py", "r", encoding="UTF-8") as f:
        lines = f.readlines()
        req = ['h', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd', '!']
        temp = []
        
        chars = [char for line in lines for char in line]
        
        while temp != req:
            random_index = random.randint(0, len(chars) - 1)
            
            if req[len(temp)] == chars[random_index]:
                temp.append(chars[random_index])
                chars.pop(random_index)
        return "".join(temp)

# Write a function `greet` that returns "hello world!"
import os

def check_if_contains(l1, l2):
    contains_all = True
    for ind in range(len(l2)):
        if l1[ind] != l2[ind]:
            contains_all = False
    return contains_all

def get_length(l, substract):
    i = 0
    for _ in range(len(l)):
        i += 1
    if substract:
        return i - 1
    if not substract:
        return i

def append_item(l, c):
    l.append(None)
    
    length = get_length(l, True)
    l[length] = c
    
def build_string(l):
    string_builder = ""
    for ind in range(len(l)):
        string_builder += l[ind]
    return string_builder

def greet():
    with open(os.getcwd() + "/solution.py", "r", encoding="UTF-8") as f:
        lines = f.readlines()
        req = ['h', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd', '!']
        temp = []
        for line in lines:
            for char in line:
                append_item(temp, char)
                if check_if_contains(req, temp):
                    if get_length(req, False) == get_length(temp, False):
                        return build_string(temp)
                else:
                    temp = []