Insulation
insulation
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COLD
ENERGY
FIRE
HEAT
HOT
INSULATOR
STOVE
SUN
TRANSFER
| R | T | K | F | U | Z | D | U | R |
| U | C | R | S | E | D | L | O | C |
| M | V | E | A | K | E | T | M | N |
| E | N | V | B | N | A | R | Q | Y |
| P | I | O | N | L | S | T | E | J |
| O | C | T | U | A | O | F | O | H |
| N | U | S | Y | I | T | A | E | H |
| B | N | E | N | E | R | G | Y | R |
| I | L | X | A | E | R | I | F | G |
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