ISOLADOS, 93 bytes
ISOLAAAADOS ISOLAAAAAADOS ISOLAAAAAAAADOOS ISOLAAADOOOOOOS ISOLAAAAAAAADOOOS ISOLAAAAAAAAADOS
ISOLAAAADOS input
ISOLAAAAAADOS duplicate
ISOLAAAAAAAADOOS length
ISOLAAADOOOOOOS square root
ISOLAAAAAAAADOOOS a split into chunks of length b
ISOLAAAAAAAAADOS join by new lines