hubieran calzado
-they/you had worn
Past perfect subjunctiveellos/ellas/ustedesconjugation ofcalzar.

calzar

Cualquiera que ha pasado algún tiempo examinando un globo terráqueo en detalle probablemente ha notado que los continentes lucen como si estos hubieran calzado juntos.
Anyone who has taken time to examine a globe in detail has probably noticed that the continents look like they could fit together.
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haunted