mix lines verbose by ludo

t=strsplit
h=length
p=a=""
for(b in t(readLines("stdin"),p)){a=unlist(t(paste(b,a,sep=p),p))[-2*max(h(b),h(a)+1)]
cat(a,"
",sep=p)}

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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