code: def contain_string(haystack, needle):
      if len(needle) == 0:
          return 0
      if len(needle) > len(haystack):
          return -1
      for i in range(len(haystack)):
          if len(haystack) - i < len(needle):
              return -1
          if haystack[i : i + len(needle)] == needle:
              return i
      return -1
  
label_desc: Use image node_id 1 for calling a global function with example usage: contain_string(haystack, needle) and returns: unknown, int, unknown, unknown, i