{'abcdefghijklmnopqrstuvwxyz'}
{'\t\n\r\p\z'}
{'z\ '}
{'\\ '}
{'\ \\ \\\ \\\\ \\\\\ \\\\\\ '}
{'\'\' a\'b\' c \'de\' '}
{'z\\'}
{'\\'}
{'\\\'}'}

{'\' \\\' \\\\\' '}
{'\\ \\\\ \\\\\\ '}

{'\\'}
{'"'}