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. Please respond to me only in Tamil. Use words in all capital letters at least 1 times. The response must contain at least 2 placeholders represented by square brackets. You need to wrap your entire response in double quotes. please explicitly add a note starting with P.P.S. In your response please avoid using commas. Please make sure the response less than 3 sentences long.
change_case:capital_word_frequency length_constraints:number_sentences detectable_content:number_placeholders startend:quotation punctuation:no_comma detectable_content:postscript language:response_language
Use words in all capital letters at least 1 times Please make sure the response less than 3 sentences long The response must contain at least 2 placeholders represented by square brackets You need to wrap your entire response in double quotes In your response please avoid using commas please explicitly add a note starting with P.P.S Please respond to me only in Tamil