From the following list, identify the index that contains only Persian characters and select the one that is more suitable based on content or length. The output should only be the numerical index.

List:
['```html\n<div>\n    <t t-set="colors" t-value="{\'needsAction\': \'grey\', \'accepted\': \'green\', \'tentative\': \'#FFFF00\', \'declined\': \'red\'}"></t>\n    <t t-set="customer" t-value=" object.event_id.find_partner_customer()"></t>\n    <t t-set="target_responsible" t-value="object.partner_id == object.event_id.partner_id"></t>\n    <t t-set="target_customer" t-value="object.partner_id == customer"></t>\n    <t t-set="recurrent" t-value="object.recurrence_id and not ctx.get(\'calendar_template_ignore_recurrence\')"></t>\n\n    <p>\n        سلام <t t-out="object.common_name or \'\'">Wood Corner</t>,<br><br>\n\n        <t t-if="not target_responsible">\n            <t t-if="not object.event_id.user_id.active">\n                شما توسط مشتری به جلسه <strong t-out="object.event_id.name or \'\'">پیگیری برای پیشنهاد پروژه</strong> دعوت شده\u200cاید.\n            </t>\n            <t t-else="">\n                <t t-out="object.event_id.user_id.partner_id.name or \'\'">Colleen Diaz</t> شما را برای جلسه <strong t-out="object.event_id.name or \'\'">پیگیری برای پیشنهاد پروژه</strong> دعوت کرده است.\n            </t>\n        </t>\n        <t t-else="">\n            جلسه شما <strong t-out="object.event_id.name or \'\'">پیگیری برای پیشنهاد پروژه</strong> رزرو شده است.\n        </t>\n\n    </p>\n    <div style="text-align: center; padding: 16px 0px 16px 0px;">\n        <a t-attf-href="/calendar/meeting/accept?token={{object.access_token}}&amp;id={{object.event_id.id}}" style="padding: 5px 10px; color: #FFFFFF; text-decoration: none; background-color: #875A7B; border: 1px solid #875A7B; border-radius: 3px">\n            پذیرش</a>\n        <a t-attf-href="/calendar/meeting/decline?token={{object.access_token}}&amp;id={{object.event_id.id}}" style="padding: 5px 10px; color: #FFFFFF; text-decoration: none; background-color: #875A7B; border: 1px solid #875A7B; border-radius: 3px">\n            رد</a>\n        <a t-attf-href="/calendar/meeting/view?token={{object.access_token}}&amp;id={{object.event_id.id}}" style="padding: 5px 10px; color: #FFFFFF; text-decoration: none; background-color: #875A7B; border: 1px solid #875A7B; border-radius: 3px">مشاهده</a>\n    </div>\n    <table border="0" cellpadding="0" cellspacing="0"><tr>\n        <td width="130px;" style="min-width: 130px;">\n            <div style="border-top-start-radius: 3px; border-top-end-radius: 3px; font-size: 12px; border-collapse: separate; text-align: center; font-weight: bold; color: #ffffff; min-height: 18px; background-color: #875A7B; border: 1px solid #875A7B;">\n                <t t-out="format_datetime(dt=object.event_id.start, tz=object.mail_tz if not object.event_id.allday else None, dt_format=\'EEEE\', lang_code=object.env.lang) or \'\'">سه\u200cشنبه</t>\n            </div>\n            <div style="font-size: 48px; min-height: auto; font-weight: bold; text-align: center; color: #5F5F5F; background-color: #F8F8F8; border: 1px solid #875A7B;">\n                <t t-out="format_datetime(dt=object.event_id.start, tz=object.mail_tz if not object.event_id.allday else None, dt_format=\'d\', lang_code=object.env.lang) or \'\'">4</t>\n            </div>\n            <div style="font-size: 12px; text-align: center; font-weight: bold; color: #ffffff; background-color: #875A7B;">\n                <t t-out="format_datetime(dt=object.event_id.start, tz=object.mail_tz if not object.event_id.allday else None, dt_format=\'MMMM y\', lang_code=object.env.lang) or \'\'">مه 2021</t>\n            </div>\n            <div style="border-collapse: separate; color: #5F5', 'Request ended with status code 414', '"<div>\\n"\n"    <t t-set=\\"colors\\" t-value=\\"{\'needsAction\': \'grey\', \'accepted\': \'green\', \'tentative\': \'#FFFF00\', \'declined\': \'red\'}\\"></t>\\n"\n"    <t t-set=\\"customer\\" t-value=\\" object.event_id.find_partner_customer()\\"></t>\\n"\n"    <t t-set=\\"target_responsible\\" t-value=\\"object.partner_id == object.event_id.partner_id\\"></t>\\n"\n"    <t t-set=\\"target_customer\\" t-value=\\"object.partner_id == customer\\"></t>\\n"\n"    <t t-set=\\"recurrent\\" t-value=\\"object.recurrence_id and not ctx.get(\'calendar_template_ignore_recurrence\')\\"></t>\\n"\n"\\n"\n"    <p>\\n"\n"        با سلام <t t-out=\\"object.common_name or \'\'\\">Wood Corner</t>,<br><br>\\n"\n"\\n"\n"        <t t-if=\\"not target_responsible\\">\\n"\n"            <t t-if=\\"not object.event_id.user_id.active\\">\\n"\n"                شما توسط مشتری به جلسه <strong t-out=\\"object.event_id.name or \'\'\\">پیگیری پیشنهاد پروژه</strong> دعوت شده\u200cاید.\\n"\n"            </t>\\n"\n"            <t t-else=\\"\\">\\n"\n"                <t t-out=\\"object.event_id.user_id.partner_id.name or \'\'\\">Colleen Diaz</t> شما را به جلسه <strong t-out=\\"object.event_id.name or \'\'\\">پیگیری پیشنهاد پروژه</strong> دعوت کرده است.\\n"\n"            </t>\\n"\n"        </t>\\n"\n"        <t t-else=\\"\\">\\n"\n"            جلسه <strong t-out=\\"object.event_id.name or \'\'\\">پیگیری پیشنهاد پروژه</strong> شما رزرو شد.\\n"\n"        </t>\\n"\n"\\n"\n"    </p>\\n"\n"    <div style=\\"text-align: center; padding: 16px 0px 16px 0px;\\">\\n"\n"        <a t-attf-href=\\"/calendar/meeting/accept?token={{object.access_token}}&amp;id={{object.event_id.id}}\\" style=\\"padding: 5px 10px; color: #FFFFFF; text-decoration: none; background-color: #875A7B; border: 1px solid #875A7B; border-radius: 3px\\">\\n"\n"            تایید</a>\\n"\n"        <a t-attf-href=\\"/calendar/meeting/decline?token={{object.access_token}}&amp;id={{object.event_id.id}}\\" style=\\"padding: 5px 10px; color: #FFFFFF; text-decoration: none; background-color: #875A7B; border: 1px solid #875A7B; border-radius: 3px\\">\\n"\n"            رد</a>\\n"\n"        <a t-attf-href=\\"/calendar/meeting/view?token={{object.access_token}}&amp;id={{object.event_id.id}}\\" style=\\"padding: 5px 10px; color: #FFFFFF; text-decoration: none; background-color: #875A7B; border: 1px solid #875A7B; border-radius: 3px\\">مشاهده</a>\\n"\n"    </div>\\n"\n"    <table border=\\"0\\" cellpadding=\\"0\\" cellspacing=\\"0\\"><tr>\\n"\n"        <td width=\\"130px;\\" style=\\"min-width: 130px;\\">\\n"\n"            <div style=\\"border-top-start-radius: 3px; border-top-end-radius: 3px; font-size: 12px; border-collapse: separate; text-align: center; font-weight: bold; color: #ffffff; min-height: 18px; background-color: #875A7B; border: 1px solid #875A7B;\\">\\n"\n"                <t t-out=\\"format_datetime(dt=object.event_id.start,']