7*55+7*45+3*45+3*55=1000
8×2+2×92+8×98+2×8=1000
37×59+37×41+63×59+41×63=10000
356×73+664×27+73×644+27×356=102000
7*55+7*45+3*45+3*55=1000
8×2+2×92+8×98+2×8=1000
37×59+37×41+63×59+41×63=10000
356×73+664×27+73×644+27×356=102000