mystring = ' abcd efgh'
mystring = mystring + ' concatenate me!'
# upper case the string
print(mystring.upper())
# output: ABCD EFGH CONCATENATE ME!

# lower case the string
mystring = ' ABCD EFGH'
mystring = mystring + ' concatenate me!'
print(mystring.lower())
# output: abcd efgh concatenate me!

# split string and remove a specific element
mystring = 'Hello World'
mystring = mystring + ' concatenate me!'
print(mystring.split('W'))
# output: ['Hello ', 'orld concatenate me!']
243671fcdeed462fc1794f8cb9cbabab5adce1c7
<mask token>

<mask token>
print(mystring.upper())
<mask token>
print(mystring.lower())
<mask token>
print(mystring.split('W'))

mystring = ' abcd efgh'
mystring = mystring + ' concatenate me!'
print(mystring.upper())
mystring = ' ABCD EFGH'
mystring = mystring + ' concatenate me!'
print(mystring.lower())
mystring = 'Hello World'
mystring = mystring + ' concatenate me!'
print(mystring.split('W'))

mystring = ' abcd efgh'
mystring = mystring + ' concatenate me!'
# upper case the string
print(mystring.upper())
# output: ABCD EFGH CONCATENATE ME!

# lower case the string
mystring = ' ABCD EFGH'
mystring = mystring + ' concatenate me!'
print(mystring.lower())
# output: abcd efgh concatenate me!

# split string and remove a specific element
mystring = 'Hello World'
mystring = mystring + ' concatenate me!'
print(mystring.split('W'))
# output: ['Hello ', 'orld concatenate me!']