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#!/usr/bin/env lua
-- run <script> <space-separated strings, with the target string last>
function canInterleave(a,b,c)
if math.max(a:len(),b:len(),c:len()) == 0 then return true end
if a:sub(1,1) == c:sub(1,1) then return canInterleave(a:sub(2),b,c:sub(2)) end
if b:sub(1,1) == c:sub(1,1) then return canInterleave(a,b:sub(2),c:sub(2)) end
return false
end
print(canInterleave(table.unpack(arg,1,3)) and 1 or 0)
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