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