{% set ns = namespace(pros=0, cons=0) %}
{% for i in range(20) %}
{% if uniquePathsAt(elements, 'pros-' ~ i ~ '$') | length != 0 %}
{% set ns.pros = i %}
{% endif %}
{% if uniquePathsAt(elements, 'cons-' ~ i ~ '$') | length != 0 %}
{% set ns.cons = i %}
{% endif %}
{% endfor %}
{% set nb_rows = [ns.pros, ns.cons] | max %}
{% macro cell(index, count, id) -%}
{% set has = count >= index %}
{% if has %}
{% if index == count %}
{% endif %}
{% if count > 1 %}
{% endif %}
{% endif %}
{%- endmacro %}
{% macro row(index, count_pros, count_cons) -%}
{{ cell(index, count_pros, 'pros')}}
{{ cell(index, count_cons, 'cons')}}
{%- endmacro %}