def encode(strs):
res = '<STR_LIT>'<EOL>for string in strs.split():<EOL><INDENT>res += str(len(string)) + "<STR_LIT::>" + string<EOL><DEDENT>return res<EOL>
Encodes a list of strings to a single string.
    :type strs: List[str]
    :rtype: str