Opposite homozygous locations (in red) divide the chromosomes into half-identical regions (in black) shared by person 1 and person 2:

Person 1:

gtacgaccctagatcgatcatacccgtacgcatcatcgtacgaccctagatcgatcatacccgtacgcatcat
actgtaccatcgcatctccatcatatccactacatacacagggatctatcatcatatccatcgtcagcatcca

Person 2:

acagggatctatcatcatatccatcgtcagcatctatgtacgaccctagatcgatcatacccgtacgcatcat
gctctactcactcatctccttactcttccctccatatgctctactcactcatctccttactcttccctccaaa