---

def sum_from_file(a):
    
    summ=0
    try: 
        with open(a,'r',encoding='utf-8') as file:
            for line in file:
                clean_line = line.strip()
                if  clean_line.isdigit() :
                    summ= summ + int(clean_line)
            return summ
    except:
            return "Файл не найден"