s/ / < / h :1 s/.<./</ t1 /.</{g;s/</>/;b} /<./{g;b} g :2 s/^\(.\)\(.*< \)\1/\2/ t2 /^ /{g;s/</=/;b} s/^/0123456789 / /\(.\)\(.\)*.* \1.* \2/{g;b} g;s/</>/
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