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saved 4 bytes

edited Mar 4, 2022 at 16:06

edited Mar 4, 2022 at 16:06

JavaScript (ES6), 128 bytes

Non-centered crates are shifted to the right.

a=>(w=eval(a.join`+`),g=x=>(q=W-a[y/w|0]*w)?`* 
`[--x?-~y%w>1&(X=q/2+x)%w>=2|X<q|X>=W:++y&&2]+g(x||W):'')(W=[...a].pop(y=0)*w+1)

answered Mar 4, 2022 at 15:58