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<?php if (have_posts()) : ?>
  <?php while (have_posts()) : the_post(); ?>
    <?php $next_post = get_next_post(); 
			if ($next_post) { ?>
		    <a class="next" href="<?php echo get_permalink( $next_post->ID ); ?>"><?php echo $next_post->post_title; ?> <i class="fa fa-angle-right" aria-hidden="true"></i></a>
      <?php }
			$prev_post = get_previous_post(); 
			
			if ($prev_post) {?>
        <a class="prev" href="<?php echo get_permalink( $prev_post->ID ); ?>"><i class="fa fa-angle-left" aria-hidden="true"></i> <?php echo $prev_post->post_title; ?></a>
			<?php }
		endwhile; ?>
<?php endif; ?>