121. Reverse the alphabetical order of characters in a string.
122. Create a string from every second character in a given string.
123. Create a string by repeating every character twice.
124. Convert a string to a float.
125. Convert a float to a string.
126. Find the second word in a string.
127. Reverse the first and last word in a string.
128. Convert all spaces in a string to underscores.
129. Swap the first half and the second half of a string.
130. Check if a string can be divided into two equal parts.
131. Find the last occurrence of a word in a string.
132. Replace every consonant in a string with ''.
133. Replace every vowel in a string with ''.
134. Check if all characters in a string are unique.
135. Reverse the order of the vowels and consonants separately in a string.
136. Remove all leading vowels from a string.
137. Remove all trailing consonants from a string.
138. Extract all uppercase letters from a string.
139. Extract all lowercase letters from a string.
140. Check if the ASCII value of the first character in a string is even or odd.
141. Count the number of special characters in a string.
142. Insert a space after every character in a string.
143. Remove all newline characters from a string.
144. Replace all vowels with their uppercase counterparts.
145. Check if a string can be formed by rearranging another string.
146. Swap the characters at two given positions in a string.
147. Check if two strings have the same length.
148. Find the maximum ASCII value character in a string.
149. Find the minimum ASCII value character in a string.
150. Replace the first character of each word in a string with its uppercase counterpart.
151. Replace the last character of each word in a string with its uppercase counterpart.
152. Capitalize the first vowel in each word of a string.
153. Reverse the last character of each word in a string.
154. Extract the substring between two given characters in a string.
155. Check if a string contains all the vowels.
156. Create a string with the first three characters of another string repeated.
157. Remove the middle character(s) from a string.
158. Check if two strings are mirror images of each other.
159. Convert every second character of a string to uppercase.
160. Replace every third character in a string with a given character.