Write a Python program that takes a list of numbers as input from the user, calculates the sum of all even numbers in the list, and returns the result. The program should check if the input is valid (i.e., if it's a list of numbers), and if it's not, it should return an error message. The program should also handle exceptions gracefully and return a user-friendly error message in case of any exceptions. At the end of your response, please explicitly add a postscript starting with P.S.. Add stress words which are capitalized. Limit those stress words for less than 4 times. Include exactly 3 bullet points in your response. The bullet points should be in the form of:
* This is bullet 1
* This is bullet 2
...
. response should be entirely in Telugu, no other language is allowed. In your response please avoid using commas. Your answer must also contain at least 1 placeholder (an example of a placeholder is [address]). Write exactly 4 paragraphs each separated with two new lines answering this instruction. The fourth paragraph must start with "HARSH".
punctuation:no_comma length_constraints:nth_paragraph_first_word detectable_format:number_bullet_lists change_case:capital_word_frequency detectable_content:number_placeholders language:response_language detectable_content:postscript
In your response please avoid using commas Write exactly 4 paragraphs each separated with two new lines answering this instruction. The fourth paragraph must start with "HARSH" Include exactly 3 bullet points in your response. The bullet points should be in the form of:
* This is bullet 1
* This is bullet 2
...
 Add stress words which are capitalized. Limit those stress words for less than 4 times Your answer must also contain at least 1 placeholder (an example of a placeholder is [address]) response should be entirely in Telugu, no other language is allowed At the end of your response, please explicitly add a postscript starting with P.S.