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// UNTESTED
    for(int a = 1; a<10; a++)
    {
        printf("%d\n",a);
    }

// UNTESTED
// UPDATED: de-obfuscated
...
            a++;
        }
    }

# UNTESTED
for (;EXPR;) BLOCK   # leave first and third EXPRs blank to be
...
     VAR = shift @list) BLOCK            # somewhat like
                                         # foreach VAR (LIST) BLOCK
                                         # without the usual aliasing

perl -MO=Deparse -e "for (;<>;){print}"
while (defined($_ = <ARGV>)) {
    print $_;
}
-e syntax OK