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