FO4ZIKFIZY35GBBNL2V4OCRUSSI2WNZFWSZHAI5BWZENFH5QFG2AC
6NB2PU2F64XDSURKYMBECKEN7ZQ63RMDN2GL5CP74YA6HE4K3TTAC
7MCTB5G2W6IB7JQXGO2HCMRHBUYIOKXI4MBODKLAJIK66EMLC5ZQC
const surface_kwc = 5
const surface_kwc = 2.5