power 4d[ Power Pattern ] Find best premutated 4D numbers based on historical trend.For eg., ABCD=24x, AACD=12x, AABB=6x, AAAB=4x, AAAA=1x Please note thatWe show a universal 4D printing technology for manufacturing MXene hydrogels with customizable geometries, which suits a family of MXenes.