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e + k + o + p + s = 3
a + e + m + s = 2
...
d + e + k + s + u = 3
b + m + p + s + u = 2
a + b + d + e + h + k + m + o + p + s + u <= 5

/^[adet]{5}$/ || /^[adev]{5}$/

'adet' => [ 'date', 'dated', ... ],
'adev' => [ 'dave', 'evade', 'evaded', ... ],