function GetItem takes integer raw returns integer
 if raw == 'I000' then
  return 1
 endif
 if raw == 'I001' then
  return 2
 endif
 ...
 ...
 if raw == 'In' then
  return n + 1
 endif
 return 0
endfunction

function GetItem takes integer raw returns integer
  return raw - 0x4930302F
endfunction

function GetItem takes integer raw returns integer
  if raw >= 'I000' and raw <= 'I123' then
    return raw - 'I000' + 1
    // return raw - 0x4930302F
  endif
  return 0
endfunction