#Original Code, Engineered by Afan Shaikh.
try:
    source= open('source.txt', 'r')
    dum = source.readline()
    print("File is read successfully.")
    source.seek(0)
except FileNotFoundError:
    print('\n\n\nsource.txt file not found. Create it first!\n\n\n')
except IOError:
    print('The source file has an IO error')


MDT =[]
MNT =[]

def macroman(line):
    name = line.split()[1] #A concise way to get the 2nd word-> name of macro. index =1. first split and then get 2nd word
    entry = []
    entry.append(line.strip()) #append the macro definition line
    while True:
        line=source.readline().upper()
        if not line:
            print('No MEND found for: ', name)
            return
        if 'MACRO' in line:
            macroman(line)
        elif 'MEND' in line:
            global MDT, MNT
            entry.append(line.strip()) #MEND line appended too
            MNT.append([len(MNT)+1, name, len(MDT)+1]) # Eg. 1 Fibo 50
            MDT = MDT + entry
            return
        else:
            entry.append(line.strip())
        

def driver():
    global MDT, MNT
    while True:
        line = source.readline().upper()
        if not line:break
        if 'MACRO' in line:
            macroman(line)
    print('\nMNT:')
    for a in MNT:
        print(a)
    print('\n\nMDT:')
    i=0
    for a in MDT:
        i=i+1
        print (i, ' ',a)

driver()