Pentomino Box Packing : Solid U

10 solutions.

1. VU..LL | VU..FN | VU..FW
   ZU..FL | ZT..FN | VU..WW
   IIIIIL | ZTTTFN | VPPWWN
   YYYYXL | ZTYXXX | ZPPPXN

2. UU..LL | XU..FY | UU..FW
   XT..FL | XT..FY | XT..WW
   IIIIIL | XTNNFY | NNNWWY
   VVVZZL | VTPPZY | VPPPZZ

3. WP..ZV | PP..UU | PP..LL
   WW..ZV | XT..ZU | NN..ZL
   XWWVVV | XTTTUU | XNNNZL
   IIIIIF | XTYFFF | YYYYFL

4. UU..PP | LL..PP | VF..PW
   UF..NN | LF..ZW | VF..XW
   UUNNNW | LFZZZW | VVVXXX
   IIIIIT | LYZTTT | YYYYXT

5. UU..TN | UX..TL | UU..TL
   ZX..FN | ZX..TN | WX..PL
   VVVFFF | ZXVYTN | WWVPPL
   IIIIIF | ZYYYYN | ZWWPPL

6. UU..TP | UX..PP | UU..PP
   ZX..TV | ZX..TF | WX..TL
   YYYYTV | ZXYFFF | WWLLLL
   IIIIIV | ZNNNFV | ZWWNNV

7. PP..UU | LL..UF | VW..UU
   PP..NN | LW..ZF | VW..XF
   PWNNNF | LWZZZF | VVVXXX
   IIIIIT | LYZTTT | YYYYXT

8. PV..UU | PV..YU | PV..UU
   WV..YT | PZ..YT | PX..FT
   WVLLLL | WZZZYT | XXXFFF
   IIIIIL | WNNZYT | WXNNNF

9. PV..UU | PV..XU | PV..UU
   WV..XL | PT..XZ | PF..XZ
   WVLLLL | WTTTXZ | FFYYYY
   IIIIIZ | WTNNNZ | WFFYNN

10. PP..VL | PP..VU | WP..VU
    NN..VL | XT..ZZ | WW..FU
    XNNNVL | XTTTZU | XWWFFU
    IIIIIL | XTYZZL | YYYYFF