Username = input('username:')
Password = input('password:')

if Username == ('bob101')  :
    print ('Username correct')

if Password == ('1234')  :
    print ('Password correct')

if Username == ('jake102')  :
    print ('Username not recongnised')

if Password == (4321)  :
    print ('Sorry, your password is incorrect')

if Password and Username == ('Username correct and Password correct')  : 
    print ('Welcome!')