It was possible due to lack of more regular shapes in those years, with their abundant occurrence in following years they somewhat eased in their efforts.
Inawezekana ilikuwa kutokana na ukosefu wa maumbo zaidi ya mara kwa mara katika miaka Wale, na tele Matukio yao katika miaka Ifwatayo Wao kuachia kidogo katika juhudi zao.